QWIIC MP3 trigger - how to predict the playback delay?

Sensors Sound & Audio
1

I was looking at getting this board to produce sound effects as part of a user-interactive museum display.

My intent would be to use the Trigger inputs only (but I can do I2C control if necessary).

From other posts on this forum, I gather that there is a time delay between the Trigger and the actual sound output.

How much delay are we talking about? I don’t need an exact number, but (say) in increments of 100 mS?

Is it variable, and if so, what factors control it? [I gather from a similar Arduino device that the MP3 must be loaded and decoded after the trigger, and this takes measurable time.]

The sound effects I would use are only a few seconds long, if that helps…

BTW, I saw a similar forum post, and there was a brief reply recommending a WAV device instead of MP3. Would that advice apply to my case also?

Thanks!

Pete M.

Hewlett-Packard (retired)

Volunteer at Western Museum of Mining & Industry in Colo. Springs

P.S. - Nate, in case you’re reading this: You won’t remember I’m sure, but we met once 10-12 years ago, and you showed me around your facility. :slight_smile:

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I know you are asking about the Qwiic MP3 Trigger, and I can’t provide any guidance on that particular product, but I recently wrote a post about audio latency with regard to the WAV Trigger and Tsunami that you may find interesting.

https://robertsonics.com/2021/03/26/lat … osd-cards/

3

Update: I bought an Adafruit 2341 board, and it seems perfect. It does WAV or OGG, and the delay is minimal and predictable.

So, I no longer care about the answer to my question, but perhaps someone else would.

Pete