abletonparsing 0.1.1

Python module for parsing Ableton Live ASD clip files containing warp markers.

AbletonParsing

Parse an Ableton ASD clip file in Python.

Install

pip install abletonparsing

API

Clip class:

• .loop_on - ( bool , READ/WRITE ) - Loop toggle is on
• .start_marker - ( float , READ/WRITE ) - Start marker in beats relative to 1.1.1
• .end_marker - ( float , READ/WRITE ) - End marker in beats relative to 1.1.1
• .loop_start - ( float , READ/WRITE ) - Loop start in beats relative to 1.1.1
• .loop_end - ( float , READ/WRITE ) - Loop end in beats relative to 1.1.1
• .hidden_loop_start - ( float , READ/WRITE ) - Hidden loop start in beats relative to 1.1.1
• .hidden_loop_end - ( float , READ/WRITE ) - Hidden loop end in beats relative to 1.1.1
• .warp_markers - ( list[WarpMarker] , READ/WRITE ) - List of warp markers
• .warp_on - ( bool , READ/WRITE ) - Warping is on
• .sr - ( float , READ/WRITE ) - Sample rate of audio data

WarpMarker class:

• .seconds - ( float , READ/WRITE ) - Position in seconds in the audio data.
• .beats - ( float , READ/WRITE ) - Position in "beats" (typically quarter note) relative to 1.1.1

Note that if loop_on is true, then hidden_loop_start will equal the loop_start, and the hidden_loop_end will equal the loop_end. If loop_on is false, then loop_start will equal the start_marker, and loop_end will equal the end_marker. In both cases, the value of loop_on does not affect the absolute value of hidden_loop_start or hidden_loop_end.

Example

import abletonparsing

import librosa
import soundfile as sf
import pyrubberband as pyrb

bpm = 130.
audio_path = 'drums.wav'
clip_path = audio_path + '.asd'

audio_data, sr = librosa.load(audio_path, sr=None, mono=False)
num_samples = audio_data.shape[1]

clip = abletonparsing.Clip(clip_path, sr, num_samples)

time_map = clip.get_time_map(bpm)

# Time-stretch the audio to the requested bpm.
output_audio = pyrb.timemap_stretch(audio_data.transpose(), sr, time_map)

with sf.SoundFile('output.wav', 'w', sr, 2, 'PCM_24') as f:
	f.write(output_audio)