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replace descript-audio-codec with lightweight DAC shim

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The real descript-audio-codec package pulls in descript-audiotools,
which transitively requires onnx, tensorboard, protobuf, matplotlib,
pystoi, and other heavy dependencies. onnx fails to build from source
on macOS due to CMake version incompatibility.

TADA only uses Snake1d (a 7-line PyTorch module) from DAC. This commit
adds a shim in backend/utils/dac_shim.py that registers fake dac.*
modules in sys.modules with just the Snake1d class, completely
eliminating the DAC/audiotools dependency chain.
This commit is contained in:
James Pine
2026-03-17 02:16:33 -07:00
parent 4e7772a21d
commit b02ce8e2f3
4 changed files with 108 additions and 14 deletions
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backend/requirements.txt
+4 -2
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@@ -34,8 +34,10 @@ spacy-pkuseg
pyloudnorm
# HumeAI TADA sub-dependencies (hume-tada itself is installed
# --no-deps in the setup script because it pins torch>=2.7,<2.8)
descript-audio-codec>=1.0.0
# --no-deps in the setup script because it pins torch>=2.7,<2.8.
# descript-audio-codec is NOT installed — it pulls onnx/tensorboard
# via descript-audiotools. A lightweight shim in utils/dac_shim.py
# provides the only class TADA uses: Snake1d.)
torchaudio
# Audio processing