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Unofficial Ableton Operator features.

7/28/2019

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AMS files are multi-cycle waveforms that can be generated from Ableton Operator's additive synthesis editor. It can also be used with Ableton Sampler and Simpler.
Operator
AMS file
Open in text editor

Explain the content of the text

BaseFreq/BaseNote

BaseFreq stands for fundamental frequency.
261.625549 on the text means 261.625549 Hz, and it is worth C3 of 12 temperament. The fundamental frequency can be changed freely.

Also, BaseFreq can be rewritten to BaseNote. BaseNote allows you to enter midi note numbers instead of frequencies.

BaseFreq
261.625549 = BaseNote 60
RootKey

RootKey can be applied when importing into Sampler. 60 on the text means Midi note number 60, which means the root of the current sample. Sampler is set to C3 and is set to play only C3 on the keyboard.
RootKey
SampleRate

SampleRate means sampling frequency, default 44100 means 44.1 khz. Basically, it is common to enter 96000, 48000, 44100.
BitsPerSample
You can set the bit of sample. It can be changed to 16, 24, and 32 bit.
Volume

Volume means the volume of the waveform.
By default, it is Auto, but you can enter it and set it. However, it is recommended to leave it as Auto because it will overrun depending on the number.

Sine 1~64
Sine1 ~ 64 can set the volume of 1 ~ 64 harmonics.
The default is 64 but it can be extended to 128. You can also set cosine waves.


Convert Single Cycle Waveforms to AMS files

Picture
Simple batch conversion script for GNU Octave
Batch conversion of multiple single-cycle waveforms (wav files) to ams files.

Two types of ams files are generated: ams files with the original waveform information and  ams files with phase information removed for Operator.
Waveforms of any length can be converted, but the generated waveforms are band-limited to 128 harmonics.
  1. In the same folder, put the script and single cycle waveforms.
  2. Run the script.
  3. ams files are generated.
Download

Picture
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