FS#5508 - Recording interference with remote plugged in

Attached to Project: Rockbox
Opened by Martin Scarratt (mmmm-) - Tuesday, 06 June 2006, 22:12 GMT
Task Type Bugs
Category Recording
Status Closed
Assigned To No-one
Operating System Iriver H100 series
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


When using the remote and recording there is a lot of noise introduced.

You can test this easily as long as you have a remote handy..

-Go into the recording screen (make sure input is set as line in and no microphone is attached)
-Make sure the remote is plugged in
-Turn gain up until you see a readout on the peakmeter (mine starts at about 26db on right channel)
-Turn it up a bit more so that you can see the readout clearly (about 35db is fine for mine)
-Now pull out the remote. You can see the peakmeter reading becomes zero.
-Plug remote back in. The noise comes back.

There is a thread here about it:
along with a poll (I had to make sure it wasn't just my unit!) :)

This task depends upon

Closed by  Dominik Riebeling (bluebrother)
Monday, 25 September 2006, 14:55 GMT
Reason for closing:  Out of Date
Additional comments about closing:  closed upon request.
Comment by Peter D'Hoye (petur) - Wednesday, 07 June 2006, 11:38 GMT
Does this also happen with the original iriver firmware?
Comment by Martin Scarratt (mmmm-) - Thursday, 08 June 2006, 15:15 GMT
Ahh...yes it does although it sounds slightly different....

What I was actually thinking was that maybe something like the ticking fix may be possible for the recording screen (as the interference sounds quite similar)

So I suppose this is more of a feature request than a bug...
Comment by Davide (Davide-NYC) - Thursday, 31 August 2006, 02:58 GMT
This task should be closed.
Mmmm commited a workaround that turns of the remote LCD with a button press on the remote.
It works very well.
Comment by Davide (Davide-NYC) - Monday, 25 September 2006, 14:41 GMT
This interference is due to the remote LCD being constantly updating while drawing the peakmeters.
The original firmware has far less noise (though it still has this same noise) because it did not have any peak meters, thus the LCD updates were far fewer.
Someone please close this task. It is a hardware limitation and just litters Flyspray at this point. Thanks.