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Date/Time: Sat, 01 Mar 2025 01:36:31 +0000



Post From: WAV file trouble, bitrates/encoding?

[2021-09-07 22:31:52]
silvereagle - Posts: 23
hi friends,

I'm experiencing trouble with some wav files I want to use in my advanced custom study with sc.PlaySound.

Troubleshooting Steps:

1. Using General Settings > Alerts/General 3 I can successfully test/play/hear default sierra wav files (airplane.wav, applause.wav, etc)

2. I can also use these default sounds from within my study with sc.PlaySound.

3. I downloaded from the internet some different wav files, like buzzer sounds (for a stop) and cash register (for a target). Some will play in the Alerts/General 3 tab and some will not ---and furthermore, those that do play in the test tab have this weird delay where it seems to cut off the first half-second or so of the audio so it sounds like I only get half a "ka-ching" for a target. bizarre.

So, 1. I don't know why some wav files play, while others do not and 2. I don't know why some that play, only seem to play half the audio file.

My suspicions are that Sierra is particular about what wav files it uses and what I'm trying to use is not either in a particular format/bitrate or a different encoding. I used Audacity (an open source audio program to try and see what WAV files Sierra likes, but so far no dice in figuring this out)

WAV files can have a number of formats/bitrates:

8 kHz, 8 Bit, Mono
8 kHz, 8 Bit, Stereo
8 kHz, 16 Bit, Mono
8 kHz, 16 Bit, Stereo
16 kHz, 8 Bit, Mono
16 kHz, 8 Bit, Stereo
16 kHz, 16 Bit, Mono
16 kHz, 16 Bit, Stereo
etc...

AND WAV files can be encoded a number of different ways.

WAV (Microsoft)
Signed 16-bit PCM
Signed 24-bit PCM
Signed 32-bit PCM
Unsigned 8-bit PCM
32-bit float
64-bit float
U-law
A-law
IMA ADPCM
Microsoft ADPCM
GSM 6.10
32Kbs G721 ADPCM
16kbs NMS ADPCM
24kbs NMS ADPCM
32kbs NMS ADPCM

Audacity has an export function which should be able to convert my sounds into something Sierra likes, but I'm not sure what Sierra will like. Anyone out there know the format/bitrate and or encoding that makes Sierra happy?

Thanks!