Intermittent Error when playing local audio file on a call using ARI

I have an ARI application that makes calls and some times plays an audio file. The audio files are stored locally on the Asterisk server. I am facing a problem where about 50% of the times the playback of the file fails (not always) and it prints the below message in the logs:

[May 10 06:10:24] WARNING[125725]: res_stasis_playback.c:276 playback_final_update: c01dbe837-e541-4923-b7cd-0f8528c9b294: Playback failed for sound:/content-files/81d3961c-68ab-4b26-bbab-d59644023637

Here is the format / Encoding of the file.
root@ip-172-31-8-209:/content-files# sox --info 81d3961c-68ab-4b26-bbab-d59644023637.wav

Input File : ‘81d3961c-68ab-4b26-bbab-d59644023637.wav’
Channels : 1
Sample Rate : 8000
Precision : 16-bit
Duration : 00:00:33.24 = 265920 samples ~ 2493 CDDA sectors
File Size : 532k
Bit Rate : 128k
Sample Encoding: 16-bit Signed Integer PCM

My ARI call to play the file is:
await{ media: sound:${obj.callDetails.VMAudio}, playbackId: });

I specify format “slin” when creating the channel.

did you try providing multiple formats .
you can create them with :
file convert file.wav file.gsm
file convert file.wav file.g729

put them all in your file directory
and see if it works

What version of Asterisk? When are you trying to play the sounds? Can they be played normally from the dialplan? Have you gotten a full debug log and looked to see if it gives any further information?

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