Save Audio (FLAC) (DEPRECATED)

Save Audio (FLAC) is the pack's audio-output node, and the display name says it plainly: DEPRECATED. It still works - it takes an AUDIO tensor and writes it out as a FLAC file to your output directory - but the pack authors have flagged it as the old way to do this, so treat it accordingly: fine for a quick local save, risky as a foundation for anything you plan to maintain.

For the ShellAgent use case there's a real gap here: this node doesn't appear to carry the output_name schema hook the newer save nodes have, so it's not a first-class "hand this file to the app" terminal in the same way Save Image is. It's essentially ComfyUI's core Save Audio node, wrapped.

How it works

Under the hood it subclasses ComfyUI's core SaveAudio, which writes the waveform to ComfyUI/output/<filename_prefix>.flac. The filename_prefix defaults to audio/ComfyUI, so files land in an output/audio/ subfolder. The audio output is a pass-through of the input tensor, so it can sit mid-graph and still feed a downstream node. The AUDIO type means the input side expects the {waveform, sample_rate} dict format - exactly what the pack's Input Audio node produces.

Inputs

• audio - the AUDIO tensor to save. Wire from Input Audio or any audio-source node.
• filename_prefix - output path and name, default audio/ComfyUI.

Installing it

Same one-pack install as everything else:

cd ComfyUI/custom_nodes
git clone https://github.com/myshell-ai/ComfyUI-ShellAgent-Plugin

restart, or grab ComfyUI-ShellAgent-Plugin from ComfyUI Manager. No model downloads. Audio loading/saving depends on ComfyUI's core audio support (torchaudio), not on anything this pack adds.

Common issues

• FLAC only. If you need MP3/WAV, this isn't the node - the core Save Audio behaves the same way.
• "It's deprecated, will it break?" Nobody knows, which is the point. The node still registers today, but don't build a production pipeline that can't survive a refactor.
• File went to an unexpected folder. Follow the filename_prefix - audio/ComfyUI means output/audio/ComfyUI.flac.

There's also a plural variant, Save Audios (FLAC), that's the same thing with a batch-friendly name. For anything beyond a quick test, check whether the pack has shipped a newer audio save before you commit to this one.