Stillwell Audio utility plugins

Audio Analysis, Repair, and Delivery Plugins

Start with the job: decide whether you need to observe relationships, repair an isolated problem, verify digital output, or modify a reduced-bit-depth render for delivery.

Choose the job before the tool

Choose schOPE when the job is observing waveform/time, frequency, or phase relationships across one or more signals; choose Bitter, a free plugin, when the job is observing bit usage, sample clipping, or estimated intersample peaks without processing the audio.

Choose Spectro when the job is changing only a selected time-frequency region in real time and non-destructively; choose Psycho Dither when the job is modifying reduced-bit-depth output with adaptive dither, a selected dither color, and psychoacoustic noise shaping.

Four-stage workflow

Compare signal relationships with schOPE

Observe waveform/time, frequency, and phase relationships before deciding whether the audio needs repair or delivery processing; schOPE can include multiple signals in the comparison.

Workflows and use cases

Compare kick and bass

Use schOPE to compare kick and bass in waveform/time, frequency, and phase views so their relationship can be inspected across both signals.

Compare phase or pre/post processing

Use schOPE to inspect phase relationships or compare a signal before and after processing in waveform/time and frequency views.

Repair an isolated click, overtone, or bleed

Use Spectro to select the problem in time and frequency, then apply a real-time, non-destructive edit only to that region.

Verify intersample peaks and bit usage

Use Bitter to observe sample clipping, estimated intersample peaks, and how many available bits the signal uses without processing the audio.

Render at reduced bit depth, then verify

Use Psycho Dither to apply adaptive dither, a selected dither color, and psychoacoustic noise shaping to reduced-bit-depth output, then use Bitter to verify the resulting bit usage and peak behavior.

Selection criteria

  • Decide whether the job requires observation only or a change to the audio output.
  • Choose schOPE when waveform/time, frequency, or phase relationships — including relationships across multiple signals — are the question.
  • Choose Spectro when a problem can be isolated to a selected time-frequency region for real-time, non-destructive editing.
  • Choose Bitter, which is free, when bit usage, sample clipping, or estimated intersample peaks need verification without processing the audio.
  • Choose Psycho Dither when reduced-bit-depth output needs adaptive dither, a selected dither color, and psychoacoustic noise shaping.

Choose by problem and operation

Choose by problem and operation
ProductProblemOperationTypical signal-chain positionObserves or modifies audio
schOPE Signal relationships need comparison.Observes waveform/time, frequency, and phase relationships, including across multiple signals.At the signal points being compared, including pre/post or multi-signal positions.Observes audio.
Spectro A click, overtone, bleed, or other problem is isolated in time and frequency.Applies real-time, non-destructive edits only to selected time-frequency regions.On the track whose selected region needs repair.Modifies the processed output in selected regions.
Bitter Bit usage, sample clipping, or estimated intersample peaks need verification.Observes bit usage, sample clipping, and estimated intersample peaks without processing audio.At the point where output or render behavior needs checking.Observes audio without modifying it.
Psycho Dither Reduced-bit-depth output needs dither and noise shaping.Applies adaptive dither, a selected dither color, and psychoacoustic noise shaping.At delivery, where reduced-bit-depth output is prepared.Modifies audio output.

Supporting inventory

Audio analysis, repair, and delivery products

4 plugins

Try the plugins and review licensing