[asterisk-users] Sox and bad quality when converting to 8 kHz

[Danny Nicholas]

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Thomas Winter
Sent: Thursday, March 24, 2011 3:59 PM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] Sox and bad quality when converting to 8 kHz

Hi list,
I have an 44100 Hz file with human voice, stereo with 16Bit.
When convertig this to 8 kHz, mono I loose a lot of quality and have 
some ground noise. I tried several sox options but without success.
Can somebody help....

best regards Thomas


Make sure your "voice talent" is recording in mono or a single stereo
channel.  This command works for me under these conditions:
Sox file44.wav -r 8000 -c 1 -s file8.wav