From: John P-G GM4SLV <gm4slv_at_sighthound.demon.co.uk>
Date: Wed, 1 Oct 2008 10:13:57 +0100 (BST)

Hello,

I've been a happy Rockbox user for a while now and I'm really pleased at
the functionality improvements over the OF of the iRiver H120.

I record a lot of stuff via the line in socket, from shortwave radio
receivers etc. and adjust the recording gain to peak at FSD on the peak
level meter on the WRS. Audible distortion occurs if I increas the gain
setting beyond this, so this would imply that the metering is a true
indication of the input level, and it's limitiations.

However, when playing back any recordings I see the peak meter in playback
mode only registers 50% at most.

Loading the recorded files into Audacity also shows the peak levels to be
0.5.

I can use Audacity to normalise ie amplify to put the peaks at 1 (100%)
but I'd rather fix the S/N ratio and peak levels at the recording stage,
not afterwards.

I'm confused however over the disparity between the recording level
metering (and distortion if I overdrive beyond a full scale 100% reading)
and the metering in playback mode.

Am I doing something wrong? I generally turn AGC off, and adjust the input
level and/or gain to peak at 100% for the loudest input signal.

I've searched back through the forum "recording" section, and tried to
trawl the mailing list archives for some pointers on this, to no avail.

Cheers,

John
Shetland UK

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Received on 2008-10-01