Variable-rate looping sample playback The groove~ object is a variable-rate, looping, sample-playback object which references the audio information stored in a buffer~ object having the same name. Cycling '74 MSP MSP Sampling Sample Playback Increment TEXT_HERE Loop Min TEXT_HERE Loop Max TEXT_HERE Channel 1 Output TEXT_HERE Loop Sync Output TEXT_HERE Buffer name Names the buffer~ object containing the sample to be used by groove~ for playback. Number of outputs A second argument may specify the number of output channels. The default number of channels is 1. If the buffer~ being played has fewer channels than the number of groove~ output channels, the extra channels output a zero signal. If the buffer~ has more channels and is a multiple of 2 or 4, channels are mixed. Function depends on inlet In all inlets: Converted to float.

In left inlet: Sets the sample playback position in milliseconds. 0 sets the playback position to the beginning.
In middle inlet: Sets the sample playback start position in milliseconds.
In right lnlet: Sets the sample playback start position in milliseconds. Function depends on inlet In left inlet: Sets the sample playback position in milliseconds. 0 sets the playback position to the beginning.
In middle inlet: Sets the sample playback start position in milliseconds.
In right lnlet: Sets the sample playback start position in milliseconds. Function depends on inlet In middle inlet: A list composed of three integers specifying bars, beats, and units may be used to specify the loop start point when the groove~ object is set to follow a named transport (set using the transport attribute).

In right inlet: A list composed of three integers specifying bars, beats, and units may be used to specify the loop end point when the groove~ object is set to follow a named transport (set using the transport attribute). Function depends on inlet In middle inlet: A list composed of three integers specifying bars, beats, and units may be used to specify the loop start point when the groove~ object is set to follow a named transport (set using the transport attribute).

In right inlet: A list composed of three integers specifying bars, beats, and units may be used to specify the loop end point when the groove~ object is set to follow a named transport (set using the transport attribute). Open a file buffer display window Double-clicking on a groove~ object opens the sample display window of the buffer~ object associated with the groove~ object. Define complex time stretching Use a dictionary to define more complex stretching and pitch shifting. Define a point in time (sourcetime, sourcetimesample or sourcetimebbu) and define where this point should be transformed to (desttime, desttimesample or desttimebbu). For example, the dictionary below will

• create marker01 which will stretch the file so that the audio at 500 ms will be on the first bar, will pitch-shift the audio down by 100 cents until the next marker
• create marker02 which will stretch so the material at 1000 ms will be at 1.2.0 bbu, will pitch-shift the audio by a factor of 1.1 up until the next marker
• create marker03 which will stretch the whole sample (“end”) to be twice as long

{ "marker01" : { "sourcetime" : "500", "desttimebbu" : "1.0.0", "pitchshiftcent" : -100 } , "marker02" : { "sourcetime" : 1000, "desttime" : 1.2.0, "pitchshift" : 1.1 } , "marker03" : { "sourcetime" : “end”, "desttime" : “*2”, } } Clear speed cues Clear the speed cues that have been defined via a dictionary. Print speed cues Print the currently active speed cues that have been defined via a dictionary. Reference a new buffer~ object The word set, followed by a symbol, switches the buffer~ object containing the sample to be used by groove~ for playback. Clear the start and end loop points Set the start and end loop points The word setloop, followed by two numbers, sets the start and end loop points in milliseconds. Function depends on inlet In left inlet: Defines the sample increment for playback of a sound from a buffer~. A sample increment of 0 stops playback. A sample increment of 1 plays the sample at normal speed. A sample increment of -1 plays the sample backwards at normal speed. A sample increment of 2 plays the sample at twice the normal speed. A sample increment of .5 plays the sample at half the normal speed. The sample increment can change over time for vibrato or other types of speed effects. The groove~ object uses the buffer~ sampling rate to determine playback speed.

If a loop start and end have been defined for groove~ and looping is turned on, when the sample playback reaches the loop end the sample position is set to the loop start and playback continues at the current sample increment.

In middle inlet: Sets the starting point of the loop in milliseconds.

In right inlet: Sets the end point of the loop in milliseconds. Play the loop from the start point Causes groove~ to begin sample playback at the starting point of the loop. If no loop has been defined, groove~ begins playing at the beginning. Stop playback The word stop will cause groove~ to stop playback until the next int, float, or startloop message is received. Basic tuning (from A) Set a tuning standard based on a frequency for A for pitchshifting operations (440 = default, range is 400 - 500) Follow global tempo When followgobaltempo is enabled, groove~ will calculate the current tempo out of the ratio between originaltempo and global tempo and adapt to global tempo changes. Formant Scale The word formant, followed by floating point value, sets the amount of formant scaling when pitchshifting is performed. Turn on formant correction The word formantcorrection, followed by a zero or one, disables/enables formant correction when pitch correction is performed. Lock to transport TEXT_HERE Turn on looping The word loop, followed by a zero or one, disables/enables looping. Loop end point Sets the loop end point. The end point time can be specified in any of the Max time formats. Enable loop interpolation around start and end points The word loopinterp, followed by 1, enables interpolation about start and end points for a loop. loop 0 turns off loop interpolation. By default, loop interpolation is off. Turning loop interpolation on disables resampling. Loop start point Sets the loop start point. The start point time can be specified in any of the Max time formats. Timestretching mode Set the timestretching mode to be used. Each mode is optimized for handling different kinds of audio material. All modes are zero latency.
Default mode of operation This is the default mode of operation. Monophonic sources (voice, flute) This mode is best for monophonic instruments (e.g. solo voice, flute, etc.) Optimizes for transient preservation This mode is for time stretched percussion. It provides optimal transient preservation. Balance spectral integrity with transient preservaton This mode balances spectral integrity and transient preservation for general cases. For stretch ratios greater than 2.0 This mode is intended for stretch ratios greater 2.0, a more artistic effect is intended. Good CPU performance This mode is intended for a good CPU performance/quality tradeoff. Original length The original length of the the audio file in beats. Used by followglobaltempo to calculate the speed in relation to the global transport speed. Set originallength to calculate the originaltempo. Original tempo The original tempo of the the audio file. Used by followglobaltempo to calculate the speed relative to the global transport speed. Setting the originaltempo will calculate the originallength. Phase TEXT_HERE Enable/disable pitch correction The word pitchcorrection, followed by a zero or one, enable/disables the formant-corrected chromatic intonation correction. For more extensive real-time intonation correction, use the retune~ object. Pitch shifting factor Specifies pitchshift as a factor of the original pitch (i.e. 2.0 = doubling of pitch, .5 = halving of the original pitch, etc.). Pitch shifting (in cents) Specifies pitchshift as positive or negative cent values (i.e. 100 = semitone up, -1200 = octave down). Cents may be specified as ints or floats. Timestretching quality Timestretching output quality.
Basic quality (the default) TEXT_HERE Good quality TEXT_HERE Better quality TEXT_HERE Highest quality TEXT_HERE TEXT_HERE TEXT_HERE Slur time Set the time it takes for the correction to reach the full correction amount. Typically, notes are a bit unstable at the beginning, because the attack phase of a sound has a higher amount of noise, and because singers gradually adjust their tuning after the onset of the note. The slur time makes the pitch correction sound natural because it models this effect. Higher values will yield a slower adaptation time and it will take longer for the correction to produce the corrected pitch. However, longer slur times will also preserve vibrato better. Enable/disable timestretching The word timestretch, followed by a zero or one, disables/enables timestretching. Transport object to bind to Sets the name of a transport object with which to associate. By default, the global transport is used. When the groove~ object is associated with a transport, loop points are specified using 3-item lists which correspond to time in bars, beats, and units. Out left outlet: Sample output. If groove~ has two or four output channels, the left outlet plays the left channel of the sample.

Out middle outlets: Sample output. If groove~ has two or four output channels, the middle outlets play the channels other than the left channel.

Out right outlet: Sync output. During the loop portion of the sample, this outlet outputs a signal that goes from 0. when the loop starts to 1. when the loop ends.
Note: In order for buffer playback to begin (and consequently for sync output), one of the groove~ object's output channels must be connected to another signal object.