Received my audio shield today and want some test to done...but...

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mcc

Well-known member
Hi,

today I reveived my audio shield.

A sine sweep works fine ... aside from nearly pinching my eardrum... ;)

Then I wanted to check the wavplayer.

Accessing the SDcard inserted into the Audios shield works, but the
sound stutters a lot.

I changed the header of the file to:
Code:
// Use these with the Teensy Audio Shield
//#define SDCARD_CS_PIN    10
//#define SDCARD_MOSI_PIN  7
//#define SDCARD_SCK_PIN   14

// Use these with the Teensy 3.5 & 3.6 SD card
#define SDCARD_CS_PIN    BUILTIN_SDCARD
#define SDCARD_MOSI_PIN  11  // not actually used
#define SDCARD_SCK_PIN   13  // not actually used

// Use these for the SD+Wiz820 or other adaptors
//#define SDCARD_CS_PIN    4
//#define SDCARD_MOSI_PIN  11
//#define SDCARD_SCK_PIN   13

and nothing happens anynmore.
No stuttering...no sound at all ;|

But also no printing of "Unable to access SD card"...

What is the problem here?

Cheers!
Meino
 
The change has the software access the sd card on the Teensy 3.5 or 3.6 and not the one on the audio shield.
 
Could be a file format problem. The wav player example can only play 44.1kHz 16bit PCM encoded files. It will stutter or not play if a different format is used.
 
The change has the software access the sd card on the Teensy 3.5 or 3.6 and not the one on the audio shield.

Correct! :) So I put the SDcard into to Teensy's slot and the reported problem arises.
How can I fix that?
 
Usually, this is a) a bad sd card (try a fresh one or reformat with the official format utility) or b) a problem with the hardware- unreliable connections, or too long.
 
Well...if you moved the card and get no playback and no serial response...I gots nothing for you. Should work at least poorly. If it crackles, what Frank says.
 
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