Guide contents

Reference

Limits and ranges

How many, how long and how far: the numbers behind tracks, samples, slices, knobs and files.

Project

Tracks8, one sample each
Returns4, and one master
Tempo20 to 300 BPM (120 in a new project)
Time signature2/4, 3/4, 4/4, 5/4, 6/4, 7/4, 3/8, 5/8, 6/8, 7/8, 9/8, 12/8
Length2, 4, 8, 16, 32, 64, 128 or 256 bars (8 in a new project)
Grid1/1 to 1/64, and triplets 1/4T to 1/64T
KeyNone, or one of 12 major and 12 minor keys. A label only.

Samples

File typesWAV, AIFF, FLAC, MP3
ChannelsMono or stereo
Sample rate of a file8 to 384 kHz
Loads at onceFiles up to 10 seconds
Opens the import pageFiles from 10 seconds to 10 minutes
Longest sample in a track20 seconds
Longest recording10 minutes, of which you keep up to 20 seconds
Taken as a one-shotSamples shorter than about one beat

Slices, blocks and patterns

Slices per track128
Patterns (variations) per track4: A, B, C, D
Pattern length (Bars)1, 2, 4, 8, 16, 32 or 64 bars
Blocks in one pattern1024
Repeats in one roll128 (4096 in all the rolls of one pattern)
Roll and Chop grid rates1/1 to 1/64, and triplets
Swing50 to 75 %, on 1/16 or 1/8 steps
VoicesMono, or Poly with 16 voices per track
StretchFrom a quarter of the original speed to four times
Parts per track in the song256

Sound controls

ControlRangeDefault
Pitch (track, slice)-24 to +24 semitones0
Gain (track, slice)-24 to +24 dB0 dB
Attack, Decay, Release0 to 2000 ms0 ms
Sustain0 to 11
Cutoff20 Hz to 20 kHz20 kHz (open)
Reso0 to 10
Block settings (Selected Slices)Offsets added to the slice: ±24 semitones, ±24 dB, ±2000 ms, ±8 octaves of cutoff0

Mixer

ControlRangeDefault
Fader, sendsSilence to +6 dBFader 0 dB; sends closed
PanLeft to rightCentre
Effect slots4 per track, return and master
Sends4 per track: 1 and 2 before the fader, 3 and 4 after
EQ HPF16 to 350 Hz, 18 dB per octaveOff
EQ LPF3 to 22 kHz, 12 dB per octaveOff
EQ HF±15 dB, 1.5 to 16 kHz, shelf or bell0 dB, 8 kHz, shelf
EQ HMF±15 dB, 0.6 to 7 kHz0 dB, 2 kHz
EQ LMF±15 dB, 0.2 to 2.5 kHz0 dB, 700 Hz
EQ LF±15 dB, 30 to 450 Hz, shelf or bell0 dB, 100 Hz, shelf
Meters-60 to 0 dB; green to -12, amber to -3, red above

Plugins and MIDI

Plugin formatVST3 effects
MIDI messagesControl change (CC), 7-bit or 14-bit, absolute or relative
Mapping settingsMode, Min, Max, Invert, Curve

Files Chop writes

ProjectA .chop file
Imported pieces and recordingsWAV at the source's rate and channels, 24-bit (32-bit float for float sources), in the project's Samples folder
ResamplesWAV, 32-bit float, in the project's Samples folder
ExportWAV at 44100, 48000, 88200 or 96000 Hz; 16-bit (dithered), 24-bit or 32-bit float; optional 2-second tail
AutosaveEvery 5 minutes, to a separate copy
Open RecentThe last 10 projects
Recent samplesThe last 30

Computer and window

MacApple silicon (M1 or later), macOS 11.5 or later
Memory8 GB of RAM
Screen1440 × 900 or larger
Window1320 × 840 at least; resizable; full screen
Interface zoom75, 85, 100, 115, 125, 150 %