Change log

Changes in version 0.9 (2016-12-29):

  • Added support to the SimpleArrangementEngine for modifying the ActivityVectors of the generated ActivityMatrix using the "activityVectorModification" tag. Currently, the operators "set", "clear", "flip", "and", "andNot", "or" and "xor" are supported on any chord section range of an ActivityVector. See the SimpleArrangementEngine documentation for more details.
  • Added "patternRestartMode" tag to many of the SequenceEngine implementations, which allows to define whether the generated pattern should be restarted from the beginning on each chord section change, each chord change or never, respectively. For backwards compatibility, the default is to never restart the pattern.
  • Added two more pattern expansion operators, "+" for transposing pattern up, "-" for transposing pattern down, using the syntax "(pattern)+delta" or "(pattern)-delta", respectively. For example, "2/2,(1/2,2/2,-1/2,4/2)+2" is expanded to "2/2,3/2,4/2,1/2,6/2".
  • Changed the DrumSequenceEngine implementation to allow referring to ActivityVectors in conditional patterns'/LFO's conditions even if they are not provided in the ActivityVector list of the DrumSequenceEngine. This removes the need to apply the workaround of using dummy patterns.
  • Added support for specifying a crossoverPitch attribute per chordPattern tag in the PatternHarmonyEngine. If set, this attribute allows you to override the global crossoverPitch value.
  • Added support for pausing the playback if a STOP message is received from the synchronization device. Playing will continue if either START or CONTINUE is sent.
  • Added the chord types "sus2" and "sus4". Example chord names: "Csus2", "Csus24", "Csus26", "Csus4", "Csus44", "Csus46".
  • Chord names can now be provided also in flat notation (using "b" instead of "#"), e.g. "Ab7" and "G#7" are the same.
  • Fixed a bug regarding the phase computation for LFOs running in "segmentPair" mode. Whenever the speed was set to something other than 1, the off-segment's phase was incorrect.
  • Changed the API of the Player to support proper playback abortion. Changed MidiPlayer accordingly. Now a JVM shutdown will properly mute all MIDI channels.
  • Moved the MIDI device "gervill" to the beginning of the list of MIDI devices in all examples. Set the beforePlayWaitTicks value to 16 in all examples. This will fix problems with Windows 10 (and possibly also Windows 8).
  • Removed deprecated tag "obeyChordSubtype" from various SequenceEngine implementations.
  • SoundHelix now requires Java 7 or later.

Changes in version 0.8 (2015-04-28):

  • Added support for conditional LFOs in the DrumSequenceEngine and the MidiPlayer. Similar to conditional patterns, a condition can now trigger the usage of an LFO for creating an LFO sequence, which can be used in the MidiPlayer for remote-controlling MIDI controllers. In the DrumSequenceEngine, a conditional LFO can be configured via the "conditionalLFO" tag, which can be mapped to a MIDI controller in the MidiPlayer via the "instrumentControllerLFO" tag.
  • Added support for velocity scaling in each track in the SimpleArrangementEngine via the new tag "velocity". Each track's note velocity is scaled by a factor of the given velocity divided by the song's maximum velocity. For example, if the song's maximum velocity is 1000 and you specify 500 in this tag, all velocities of all the track's sequences are halved.
  • Added support for providing a ticks-per-beat value per pattern. If the actual ticks per beat of the song is different (but compatible) all note/pause lengths of the pattern are scaled accordingly. For example, you can have a song with a ticks-per-beat value of 12 and provide some patterns with a ticks-per-beat value of 4, which will then be scaled length-wise by a factor of 3. The ticks per beat can be specified per pattern in the StringPatternEngine and in the CrescendoPatternEngine (using the attribute "ticksPerBeat") and per pattern engine in the RandomPatternEngine and RandomFragmentPatternEngine using the tag "ticksPerBeat". These new attributes/tags are optional. If they are not provided, no length scaling is performed.
  • Added support for soloing and muting individual tracks via the track tag's attributes "solo" and "mute". If at least one track uses solo="true", the song is generated only with the soloed tracks. Otherwise, all tracks which do not have mute="true" are used. In any case, all unused ActivityVectors are ignored when the song's activity matrix is generated.
  • Modified the RandomFragmentPatternEngine to regenerate a pattern from the given fragments if the target pattern length is too long for a number of times before giving up. This makes it possible to use fragments of different lengths at the same time.
  • Added support for nested pattern expansion in the chord patterns of the PatternHarmonyEngine, using the syntax "(string)*count". For example, instead of using "Am/4,F/4,Am/4,F/4,Am/4,F/4,G/4,C/4" in a pattern string you can now use (Am/4,F/4)*3,G/4,C/4" instead.
  • Added support for using "-" in the RandomPatternEngine and the RandomFragmentPatternEngine in order to create an empty pattern. For example, you can now use "A1,-,A2,-".
  • Added support for using a global seed for a component via the "globalSeed" attribute. Unlike the "salt" attribute (which derives the seed from the parent component's seed and the given salt), the "globalSeed" attribute derives the seed from the global seed and the given global salt.
  • Controllers for LFOs can now be accessed by their MIDI controller number in addition to predefined names. This allows using controllers where no predefined name exists.
  • Added new example SoundHelix-Popcorn.xml. This song uses a ticks-per-beat value of 12 to support triplets. This is now the default song when run.sh/run.bat is run without any parameters.
  • Cleaned up code.

Changes in version 0.7.1 (2014-05-31):

  • The option "--show-midi-devices" (alias "-m") now also shows devices with MIDI IN in additon to devices with MIDI OUT.
  • Fixed a stupid bug that made the MIDI device detection fail if the first MIDI device in the tag of the MidiPlayer is not available in the system. A workaround is to put just the available MIDI device in the list.

Changes in version 0.7 (2014-05-24):

  • Added support for function evaluation in pattern strings. The first function added is E(pulses, steps, on-fragment, off-fragment), which expands to the Euclidean rhythm given by the given number of pulses and steps. See the Basics documentation for details about pattern function evaluation.
  • The MidiPlayer now supports receiving synchronization messages from an external MIDI device using the "synchronizationDevice" tag. The synchronization device can supply MIDI timing ticks for remote-controlling SoundHelix' BPM speed. It can also provide START/CONTINUE and STOP messages for starting/stopping playback remotely. SoundHelix will wait for a START message if the "waitForStart" attribute is set to true, otherwise it will start playing automatically as before.
  • Added support for setting the maximum velocity using the "maxVelocity" tag in the "structure" tag (defaults to 32767 for backwards compatibility). This sets the default note velocity if no velocity is provided as well as the scaling factor when converting SoundHelix velocities to MIDI velocities. For example, instead of the (somewhat cumbersome) maximum of 32767, you could choose to to set it to 1000 instead, providing velocites as per mill values, or to 100 to use percent values.
  • Added support for using version ranges in the "version" tag. Now a comma-separated list of version specifications can be provided (each either "", "+" or "-" for application version checks in XML files. Improved percussion example to use Euclidean rhythms.
  • Improved logging. Now the default log level is INFO, where the most important details (song title, etc.) are logged.
  • Removed obsolete classes RandomSequenceEngine and RandomPatternSequenceEngine.

Changes in version 0.6 (2013-04-17):

  • Added new experimental greedy constraint mode to the SimpleArrangement engine, which only approximates the ActivityVector constraints, but is much faster and can be used for very large numbers of ActivityVectors and very long songs. Added tag "constraintMode", which can be set to "exact" for the existing backtracking-based algorithm and to "greedy" for the new greedy algorithm. Note that both modes use the "maxIterations" setting, but use the setting differently.
  • Added the new LFO synchronization mode "segmentPair", which synchronizes an LFO to the activity and pause segments of any given ActivityVector. The first half of an LFO rotation will be in the active segment, the second half in the pause segment.
  • The MidiPlayer now supports setting arbitrary MIDI controller values at the beginning of the song, using the "controllerValue" tag. This allows, for example, to set relative MIDI volumes, panning, etc., per MIDI channel to fixed values.
  • The track configuration in the SimpleArrangementEngine now supports more than one "sequenceEngine" tag. One of the provided SequenceEngines will be taken at random for the track.
  • The MidiPlayer now creates the configured output MIDI file directory if it doesn't exist.
  • Fixed applet to include the SoundHelix XML file URL in Facebook and Twitter URLs.
  • Refactored and cleaned up lots of SoundHelix' internals. This also affects the API of several externally-exposed interfaces.
  • Added new example SoundHelix-Percussion.xml.

Changes in version 0.5 (2012-10-07):

  • Added first version of the MIDI file export to the MidiPlayer. Use the tag "midiFilename" to define the MIDI filename template for writing MIDI files (one for each MIDI device) between generating and playing a song.
  • Added arbitrary skipping support to the MidiPlayer, including backward skipping. Skipping is now done instantaneously, muting the MIDI channels first. Use "skip 0" to replay the current song from the beginning.
  • For the PatternHarmonyEngine the chord crossover pitch can now be defined using the "crossoverPitch" tag. Any chord with a root pitch higher than or equal to this pitch will be transposed one octave down, otherwise the root node is taken as-is. This is only done if the chord is specified by its name (e.g. "Am6") rather than by providing the pitches in "pitch1:pitch2:pitch3" syntax. Previously, the crossover pitch always was between "D" and "D#" (i.e., starting with D#, the chords were transposed one octave down, C, C# and D were not transposed). The crossover pitch defaults to this value (3 for "D#") for backwards compatibility.
  • Added support for nested pattern expansion where pattern strings are used, using the syntax "(string)*count". For example, instead of using "0/2,0/2,0/2,1/2,0/2,0/2,0/2,1/2" in a pattern string you can now use "((0/2)*3,1/2)*2" instead.
  • Added support for "fake" seventh chords, which use 3 instead of 4 notes. Seventh chords can be selected using a simple syntax (e.g., "C7" for C major seventh, "Am76" for A minor seventh, second inversion).
  • Added the tags "precondition" and "postcondition" to the "conditionalPattern" tag of the DrumSequenceEngine, which replace the "condition" tag and have a much more user-friendly syntax for specifying the condition. For example, instead of the old ugly syntax like "0--10>1--10", you can now use something like "-base,+clap,-snare" as the precondition and "+base,+clap,-snare" as the postcondition. The "condition" tag is deprecated, but can still be used.
  • Added LinearRandomLFO, which is an LFO that linearly interpolates between a given number of random values.
  • Added usage of GNU Getopt 1.0.14 for cleaner parameter parsing. Run "java -jar SoundHelix.jar -h" to see the details. Note that the syntax of the start script parameters (run.bat and run.sh) have been changed as well. Run "run.sh -h" or "run.bat -h" to see the details. You can still run the two scripts without parameters to run SoundHelix with the default XML file.
  • Added the possibility to list all available MIDI devices with MIDI IN by starting SoundHelix with the "-m" option.
  • Updated included log4j version from 1.2.16 to 1.2.17.
  • Applied a number of refactoring operations (interfaces and implementations have moved into a different package structure, some interfaces have been changed).

Changes in version 0.4 (2012-03-13):

  • Made the MelodySequenceEngine much more configurable. You can now specify the minimum pitch ("minPitch" tag), the maximum pitch ("maxPitch" tag) and the list of pitch distances ("pitchDistances" tag).
  • Added support for generating more than one melody per distinct chord section to the MelodySequenceEngine. You can now provide a list of integers for the number of melodies to generate per distinct chord section. For each distinct chord section a numer is chosen randomly from the list and that number of melodies are generated for the chord section. The generated melodies for the distinct chord sections will be used in a round-robin manner each time the respective chord section appears.
  • Added support for specifying a minimizeChordDistance attribute per chordPattern tag in the PatternHarmonyEngine. If set, this attribute allows you to override the global minimizeChordDistance value.
  • Added "retriggerPitches" tag to the PadSequenceEngine. If set to true, all chord pitches will be retriggered on every chord change. If set to false, only the chord pitches that have changed are untriggered/triggered, the other ones are kept active. Defaults to true, because this was the behavior of version 0.3 and before.
  • Added tags "minAmplitude", "maxAmplitude", "minValue" and "maxValue" to the MidiPlayer's controller LFO configuration. "minValue" and "maxValue" lets you set a lower and upper bound, respectively, to the value generated by the LFO. This enables the user to shape existing LFO functions by cutting off the LFO function at the specified values. For example, you can use a SawtoothLFO to fade out the volume at the end of the song by using an amplitude between 0 and e.g. 5000 and limiting the maximum value to 127. Throughout the song the LFO will linearly decline from 5000 to 0 and will give 127 (maximum volume value) for every LFO value above 127. This gives you full volume throughout the song, at the end the volume will decrease to 0. An example for this is used in "SoundHelix-Piano2.xml". The tags "minimum" and "maximum" have been deprecated (but still work); use their equivalent "minAmplitude" and "maxAmplitude" instead.
  • Added more supported MIDI controllers for LFO targets to the MidiPlayer: "volume", "variation", "timbre", "releaseTime", "attackTime" and "brightness".
  • Changed the LFO implementations to use floating-point instead of fixed-point integer arithmetic. This greatly increases the LFO precision.
  • Added support for providing the section number to skip to as a floating-point number in the remote control. This allows you to skip to any position within a chord section (e.g., you can now use "skip #3.5" to skip into the middle of chord section 3).
  • Added support for unreleased versions (e.g., "0.4u", which is considered to be smaller than "0.4", but larger than anything starting with "0.3").
  • Fixed bug that treated negative chord offsets incorrectly.
  • Fixed bug in the PatternHarmonyEngine that treated different inversions of the same chord as different when the chord pattern was built (relevant for the "x!y" syntax). Now different inversions of the same chord are treated as equal.
  • Corrected the MidiPlayer's legato fix from the previous release, which lead to the note being immediately cut off if the legato flag was used with the same pitch (e.g., "0~/4,0/4"). This situation is now treated as if the legato flag were off.
  • The MIDI channels are now muted if the applet is stopped and the MidiPlayer is used.
  • Added another simple example file "SoundHelix-Piano2.xml".

Changes in version 0.3 (2011-10-01):

  • Rewrote the internals of the chord functionality and adapted all code accordingly. Now not only major and minor chords are supported, but any 3-note chords which use 3 distinct pitches that do not span more than 11 halftones. Extended the chord syntax to add inversion support to chords and added diminished and augmented chords ("dim" and "aug", respectively, e.g., "Adim4" is a diminished A chord using first inversion, "Caug6" is an augmented C chord using second inversion). Arbitrary chords can be provided with the syntax "pitch1:pitch2:pitch3". For example, "-7:-3:3" gives you the non-standard chord using the pitches F, A and e.
  • Chord lengths in the PatternHarmonyEngine can now be specified as fractions of beats instead of only whole beats (e.g., you can now use "Am/7.5" for a chord that lasts 7.5 beats). Chord lengths are rounded to the nearest integer number of ticks.
  • Renamed the tag "obeyChordSubtype" (false/true) to "normalizeChords" (true/false). Normalizing a chord means converting chords with first or second inversion (e.g., "Am4" or "Am6") to their normalized counterpart ("Am"), which has the root note at its low pitch. Note that only minor, major and diminished chords are normalized if this is on, all other chords are unchanged. Note also that "obeyChordSubtype" can still be used, but is deprecated; "normalizeChords" has higher priority if both tags are present.
  • Added "minimizeChordDistance" tag to the PatternHarmonyEngine. If set to true, all chords will be rotated so that their middle pitch is as close as possible to the first chord's middle pitch. This involves changing the inversion type of the chords, if needed. Example: if you use "Am/4,C/4", this will effectively be converted to "Am/4,C6/4", which leaves the middle pitch at "c" for both chords. Defaults to true, as this was always done in previous versions. This can be "undone" by setting "normalizeChords" to "true" in the SequenceEngines where you would like to only use the non-inverted versions of the chords.
  • Added CrescendoPatternEngine. This lets you generate a pattern from repeated pattern parts while changing the velocity so that a crescendo or decrescendo is created. Comes in handy for the DrumSequenceEngine.
  • Improved the DrumSequenceEngine to also check the precondition of conditional patterns for all chord section boundaries crossed by the pattern.
  • Added applet parameters "url" (sets the SoundHelix XML document URL) and "invisible" (hides all controls and logging if set to "true", which is nice for embedding the applet into a webpage). Please see the documentation about how to use the applet.
  • Added "beforePlayCommands" and "afterPlayCommands" to the MidiPlayer. This allows running external commands before playing a song and after playing a song, respectively. For the former, the commands are run before waiting the number of ticks configured in beforePlayWaitTicks, for the latter, the commands are run after waiting the number of ticks in afterPlayWaitTicks.
  • Added "skip" command to the remote control (usable in the console and the applet), which lets to you skip playing to the specified tick, to the specified tick percentage, to the start of the given chord section number or to the start of the next chord section during playback (type "help" in the console to see the different syntaxes). Added skipping support to the MidiPlayer.
  • The MelodySequenceEngine did not take velocity and legato flag of the provided pattern into account. Fixed.
  • Fixed bug in the velocity generation of the RandomPatternEngine if the minimum and maximum pitch is the same.
  • Fixed bug in the MidiPlayer where a NOTE_OFF for a legato pitch was skipped if the same pitch was used as in the following note (e.g., "0~/4,0/4").

Changes in version 0.2 (2011-07-31):

  • Completely rewrote the constraint fulfillment code in the SimpleArrangementEngine. Now a randomized backtracking algorithm is used to find a song activity matrix which fulfills all constraints. The time required to find a valid matrix is now a fraction of what it was before, even if more restrictive constraints are used. You might need to increase the maxInterations parameter up to a million or more if you used that parameter before (it now defaults to 1000000).
  • Added "seed" attribute which allows random seeding of a component by providing a constant 64-bit value (decimal integer with sign). Added "salt" attribute which allows to set the random salt by providing a 32-bit value (decimal integer with sign). Both attributes can be used for all tags where a "class" attribute is used for instantiating a class, but not both can be used at the same time. The provided seed value will be used instead of deriving a seed from the parent component or as a random seed salt for the seed derivation scheme, respectively. See the "Random seeds" section of the documentation for details (http://www.soundhelix.com/doc/random-seeds).
  • Added "obeyChordSections" tag to the ArpeggioSequenceEngine. If set to true, a chord that spans a chord section boundary will lead to a pattern being chosen that ends at the boundary rather than when the chord ends. Defaults to false.
  • Added "obeyChordSections" tag to the PadSequenceEngine. If set to true, a chord that spans a chord section boundary will lead to retriggering the chord at the boundary. Defaults to false.
  • Added the constraints "minSegmentLength" and "maxSegmentLength" to the SimpleArrangementEntry, which constrain the minimum and maximum activity segment lengths, respectively, of an activity vector (counted in chord sections). The two constraints will be ignored for an activity vector if the activity vector never becomes active.
  • Added the counterpart constraints "minPauseLength" and "maxPauseLength" to the SimpleArrangementEngine, which constrain the minimum and maximum pause lengths, respectively, between activity segments (counted in chord sections). The constraints will be ignored for an activity vector if the activity vector is never active or only has one activity segment.
  • Added a "uniquePatternParts" tag to the RandomPatternEngine and the RandomFragmentPatternEngine. If the value is "true", the pattern parts within a pattern group a generated until they are unique. If the value is "false", the uniqueness is not enforced. Defaults to true (which is what was used in the previous versions).
  • Added "skipWhenApplied" and "skipWhenNotApplied" tags to conditional patterns in the DrumSequenceEngine. With these two tags you can define the number of conditional patterns to skip if the current pattern was applied or was not applied (even though it was allowed to be applied), respectively. You can skip backwards by using a negative number (-1 would repeat the current conditional pattern, -2 would jump to the previous one, etc.; make sure that you don't create infinite loops). Both values default to zero, which means that processing continues with the next pattern.
  • Fixed bug that prevented correct random seeding when a song name was used on the command-line.

Changes in version 0.1 (2011-05-22):

  • Added a better random seed augmentation scheme. Now random seeds from a component are passed on to subcomponents by augmenting the value with a hash value of the implementation class of the subcomponent and the position of the subcomponent within the parent component. This makes sure that each subcomponent receives a different random seed with very high probability.
  • The DrumSequenceEngine now supports using pitch offsets relative to the base pitch. For example, if the base pitch is 36, using "0" in the pattern uses pitch 36, "1" uses pitch 37, etc. This is suitable for example for loop players, where different pitches for different loop fragments are used.
  • Removed the RhythmSequenceEngine, because it was not configurable and not really usable. Use the DrumSequenceEngine instead.
  • Added a new PatternEngine called RandomFragmentPatternEngine. This PatternEngine can be used for example to generate drum patterns. It gives you more control over the results than the RandomPatternEngine by building a pattern by concatenating provided pattern fragments, but does not support random velocity generation.
  • Added the constraints startBeforeSection and stopAfterSection to the SimpleArrangementEntry, which are the counterparts of startAfterSection and stopBeforeSection, respectively.
  • The RandomSequenceEngine and the RandomPatternSequenceEngine are now deprecated (they will be removed in a future version). Consider using the RandomPatternEngine or RandomFragmentPatternEngine with a different SequenceEngine instead.
  • Added pseudo LFO controller "milliBPM" to the MidiPlayer. This allows changing the BPM during playback using an LFO. Note that this may have some side-effects on other BPM-dependent parts of the MidiPlayer (MIDI timing ticks, LFOs, etc.), just like if you change the BPM manually during playback.
  • Re-implemented the ArpeggioSequenceEngine to use PatternEngines.
  • The SoundHelix applet now sets the applet's window title to the current song name.
  • Improved example. The example now uses the RandomFragmentPatternEngine for the percussion and the ArpeggioSequenceEngine for arpeggios.

Changes in version 0.0.5 (2011-02-27):

  • The command-line version of SoundHelix now accepts document URLs as well instead of only files, so XML files can be referenced by using HTTP/HTTPS/FTP URLs directly. Note that HTTPS requires special JVM configuration.
  • The base URL (xml:base) is now set correctly when XML documents are parsed. This means that XInclude can now be used properly. All relative URLs referenced in the XML documents are now relative to the including document URLs. The example has been changed to source out the SongNameEngine and the HarmonyEngine configuration as separate documents.
  • The RandomPatternEngine now also supports wildcards as offsets. Useful for all SequenceEngines which allow wildcards (e.g., the MelodySequenceEngine).
  • Introduced "version" attribute for the XML root tag. If present, the application version will be checked against the specified version of the tag. If the version attribute ends with a "+" (e.g., "0.0.5+"), the application version must be at least the given version, otherwise the versions must match exactly.
  • Added escaping support for splitting strings. For example, now commas in MIDI device names can be escaped by preceding them with a backslash.
  • Fixed inconsistent XML structure of the "lfo" tag of the MidiPlayer. The tag is now called "controllerLFO" without a "class" attribute, and it has (among others) a subtag called "lfo" with a "class" attribute. Fix your XML files accordingly.
  • Fixed inconsistency in the controllerLFO/channel tag of the MidiPlayer (channels were numbered from 0-15 instead of 1-16 like in the "map" tag). Fix your XML files accordingly by increasing the LFO channels by 1.
  • Added random seedability and XML configurability to the LFO interface.
  • Added song name text field to the applet. A new song with a given name can be created by entering it into the field, with the song name being used as the random seed.
  • Added buttons for Facebook and Twitter to applet, which lets you share the current song easily on Facebook/Twitter.
  • Added buttons for YouTube and SoundHelix to applet, which lets you visit the SoundHelix YouTube channel and the SoundHelix website
  • Added tooltips to all text fields and buttons in the applet.
  • Updated included log4j version from 1.2.8 to 1.2.16.
  • Improved example.

Changes in version 0.0.4 (2011-01-15):

  • Added a first version of a JNLP-based applet. The applet is available at http://www.soundhelix.com/applet/SoundHelix-applet.jnlp
  • Added support for song name generation. Each XML file now requires a songNameEngine tag.
  • A song can now be recreated by specifying its song name.

Changes in version 0.0.3 (2010-11-11):

  • Corrected small problems regarding random initialization.
  • Made run scripts play examples/SoundHelix-Piano.xml if no parameters are given.
  • Updated example.

Changes in version 0.0.2 (2010-11-07):

  • Added possibility to specify more than one MIDI device name for the MIDI player; SoundHelix will take the first one available on your system.
  • Updated example.

Changes in version 0.0.1 (2010-11-02):

  • Initial release
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