Sound cards latency

Other Hardware Audio
1

hi, i'm new.
i'm planning a little project (a digital stompbox) and i have to choose between the adafruit audio fx 2220, the DY-sv5w and the DY-HV20T.
i'll use buttons to trigger the sounds, at least for the prototype.
the focal point here is the latency, i can't find anything online so i'm asking here (i know the best option will be the sparkfun wav trigger but it's too expensive for a simple experiment).
can you help?
thank you!

matteo

2

Welcome!

Hopefully this helps.

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From the Web: Practical expectations based on similar modules:**
For this style of “trigger play” sound module (simple GPIO trigger → audio decoder), the latency is typically dominated by:

  1. Debounce handling (hardware or software) for the button
  2. Internal IO sampling loop (often a few milliseconds)
  3. Audio decoding start delay (buffer fill before playing MP3/WAV)

Real-world measurements on similar embedded audio modules often show tens of milliseconds (e.g., ~20 ms to 100 ms) from an input signal to actual audio output start, depending on file type and how the module handles file lookup and decoder warm-up. I could not any exact figures for this devices. Also your interface and associated software will also have an effect on latency.

3

Thank you! i haven't found those Infos, my fault.