20241120

• added Mod Tracker examples
• compiled SAM + midiclock for x86_64 + arm64 on macOS
• Tone can now load and play samples with Tone.load() ( currently raw format, 32bit IEEE float only )
• Sampler can now pause and resume playback

20240426

• Sampler can now record samples
• Sampler can now set to a specfic duration in seconds
• Sampler is now trigger with play() ( instead of start() )
• added example with Vocoder and SAM combined
• added example that demonstrates how to use a Sampler as an envelope
• added example where the Wavetable data can be drawn interactively
• added Waveshaper with example
• added option to check and adjust sample rate for default audio output devices with Wellen.CHECK_DEFAULT_AUDIO_DEVICE_SAMPLE_RATE = true;
• added encoding and endianess options to AudioDeviceConfiguration
• added option to correct sampling rate with Wellen.CHECK_DEFAULT_AUDIO_DEVICE_SAMPLE_RATE = true; ( for output device ) to fix error in windows OS.

20230216

• added detune oscillator to InstrumentDSP which can be enabled per instrument with enable_detune(boolean)
• added envelopes for low-pass filter (LPF) in InstrumentDSP
• Sampler can now be tuned to a base frequency. after doing so the audible frequency of the sampler can be set by ‌set_frequency(float)
• Sampler now has note_on(int,int) and note_off methods
• added callback float audio(...) to DSP to allow single sample process

20230107

• added pitch detection ( using YIN algorithm ) + sing-along example
• improved buffer drawing in DSP now draws all in- and output buffers
• added analysis package that includes the following items:
  • BeatDetection
  • EnvelopeFollower
  • FFT (Fast Fourier Transform)
  • FrequencyDistribution
  • PitchDetection
  • RootMeanSquare
  • Sonogram
  • SoundLevelPressure
• added visualizations for Sonogram + FrequencyDistribution with example ( see ExampleDSPAnalysis01SonogramFrequencyDistribution )
• added PitchShifter
• added listener functionality to Beat + BeatDSP ( similar to Trigger )
• renamed DSPTrack to Track and merged DSPModule into Track
• added Delay effect as DSP node
• renamed WAVESHAPE to WAVEFORM
• moved ( most ) DSP related classes to dedicated package ( i.e an extra import directive is required import wellen.dsp.*; from now on )
• added basic support for android platform
• added new mechanism to configure audio system with AudioDeviceConfiguration
• added options for 8/24/32-bit in+output ( wellen used to be 16-bit only )
• added enable_reverb to Tone
• added NoteEvents which generates recurring events based on the timing concept of musical notation
• added ExampleDSP23MultipleDSPInstances which demonstrates how to operate with multiple audio devices from within one application
• audio rendering can now be paused and resumed with DSP.pause(boolean)
• InstrumentDSP now interpolates frequency and amplitude changes by default. this prevents audible artifacts when changing values fast. the behavior can be deactivated with InstrumentDSP.always_interpolate_frequency_amplitude_changes = false;

20220914

• added example with SAM singing
• SAM can now speak phonemes
• SAM can now parse text strings to phonemes
• added SAM native lib for Linux Ubuntu x86_64
• added constants for (most) MIDI notes
• added option to start MIDI in/out from ID
• added option to start DSP from name
• added instructions on how to Setup Internal MIDI Communication to README
• added option to reset BeatMIDI beat counter at MIDI stop event
• added MIDI clock generator command line tool
• added option to define loop in- + output-points in Sampler ( see ExampleDSP21SamplerWithLoopPoints )
• added method Wellen.find_zero_crossings() to make sample data
• added SamplerListener so that applications can receive events when Sampler finished playing a sample
• added FilterBiquad class to DSP section
• added DaisySP library to DSP section
• added DSPTrack and DSPModule which allow to compose complex DSP-based and beat-based structures
• added VowelFormatFilter to emulate vowels formed by human vocal cords
• renamed ToneEngineInternal + InstrumentInternal to ToneEngineDSP + InstrumentDSP
• added Pattern + Loop two classes which allow to create tick/beat based composition structures
• added wavetable generators for TRIANGLE, SAWTOOTH, and SQUARE with harmonics
• added alternative set_frequency() + set_amplitude() to Wavetable that interpolates to a value rather then setting it directly ( e.g prevents audible edges in signal )

20220427

• added HarmonicTable
• added in- and out-point in Sampler
• added convenience methods to EventReceiverMIDI ( i.e midi_note_on(channel, note, velocity), midi_note_off(channel, note), midi_control_change(channel, number, value), midi_program_change(channel, number, value), midi_clock_tick(), midi_clock_start(), midi_clock_continue(), midi_clock_stop(), midi_clock_song_position_pointer(offset) )
• added new distortion types to Distortion
• added Pan with three different panning strategies
• added FMSynthesis
• added mechanism to clean up Beat timers
• fixed a conversion error which caused noise line input
• changed default sampling rate to 48KHz
• added example ExampleExternal09RecordWAV for recording line input into WAV files
• added a series of effects e.g echo, distorion, compressor ( adapted from rakarrack a guitar effect processor app written in C/C++ which in turn is using source code adpated from ZynAddSubFX )
• added master effects to ToneEngineInternal
• added master volume to ToneEngineInternal

20210105

• added instrument library
• added example for multiple tone engines
• added Envelope with multiple stages, ramp and loop option, and listeners ( for stage end and envelope end )
• added noise generator ( white, gaussian white, pink, simplex )
• added Distortion with different distortion strategies
• added Filter another filter class that implements very simple low, high and bass-pass filters
• added SAM ( Software Automatic Mouth ) a speech software first published in 1982 for Commodore C64
• added very rudimentary WAV support for im- + export
• added Vocoder

20201215

• added jitter and phase offset to Wavetable
• moved examples into a single folder
• added Reverb
• added master reverb to Tone

20201208

• renamed project to wellen
• prepared release on processing.org website
• added BeatDSP to generate a beat events from DSP
• added ExampleDSP10SampleRecorder which demonstrates how to record data and play it back with Sampler
• enabled Sampler to play samples backwards
• added ExampleInstruments08CustomDSPInstrument which demonstrates how to implement a custom instrument with multiple oscillators and a kick drum
• added FFT for analyzing audio signals
• released a series of screencasts on youtube explaining some of the examples: Wellen
• cleaned up method names to comply to methods start with verb paradigm

20201202

• implemented software tone engine ( based on DSP classes )
• removed dependency on external sound libraries ( minim + jsyn )
• removed GUI examples with controlP5
• added panning to instrument
• added LFOs to instrument
• added LPF to instrument
• made instrument options ( ADSR+LPF+LFOs ) more coherent
• software tone engine now allows to post process output with DSP
• added Low-Pass Filter class ( Moog ladder )
• improved Beat class to accept any object for callback
• improved ADSR ( removed clicks when triggered at high frequency )
• added interpolation between sample in Wavetable ( helps with small buffer LFOs )
• added Trigger to allow triggering on rising and falling edges
• introduced interfaces for input, output and process for DSP classes ( more semantic than functional )
• renamed package