Rockbox

Tasklist

FS#9248 - VU in recording screen starts in the middle instead of the far left of the screen

Attached to Project: Rockbox
Opened by Stanislas Elie (stanelie) - Thursday, 07 August 2008, 03:10 GMT
Last edited by Peter D'Hoye (petur) - Friday, 15 August 2008, 23:37 GMT
Task Type Bugs
Category Recording
Status Closed
Assigned To No-one
Operating System iriver H10
Severity Low
Priority Normal
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

The vu of the recording screen is half way to the max (or halfway to the minimum, in the middle really) when there is no sound on the line-in, as well as the mic-in.

It should start at the left of the screen instead of the middle of the screen.
This task depends upon

Closed by  Peter D'Hoye (petur)
Friday, 15 August 2008, 23:37 GMT
Reason for closing:  Fixed
Additional comments about closing:  Looks like the high pass filter setting in the audio chip works the other way around. Disabling it removes the DC offset.
Comment by Stanislas Elie (stanelie) - Tuesday, 12 August 2008, 00:26 GMT
The H10 20 go behaves the same way too. My H320 is ok though.
Comment by Peter D'Hoye (petur) - Tuesday, 12 August 2008, 19:14 GMT
confirmed on my H10 5GB

to clarify: the peakmeter shows a minimum value of 50%
Comment by Peter D'Hoye (petur) - Tuesday, 12 August 2008, 20:30 GMT
hmmm going back several months I still see this - do you know when this started?
Comment by Stanislas Elie (stanelie) - Tuesday, 12 August 2008, 20:32 GMT
Sorry, no. I think it might have always been like that, but it was not an issue because recording on these devices did not work at all in the past.
Comment by Peter D'Hoye (petur) - Friday, 15 August 2008, 08:42 GMT
I'm slightly puzzled by this as the linear scale seems to work fine...

CORRECTION: the linear scale does show some permanent 'signal' so this needs more investigation
Comment by Peter D'Hoye (petur) - Friday, 15 August 2008, 22:21 GMT
bingo: the recording shows a DC offset, which shows up as a constant volume of around -34dB

to do: check if this comes from a bad configuration or if this is just crap iriver hardware ;)

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