Support and General Use > Recording

lcd noise on sansa

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rp:
Hi!

i just tested recording on my sansa and noticed a very annoying high frequency noice when the lcd is on (or maybe just the backlight??).

have anyone a idea about it?

isn't there a same issue with playback and buffering of files?

EDIT:
rockbox-version: r13583 with sd-card patch applied

Vortex:

--- Quote ---noticed a very annoying high frequency noice when the lcd is on
--- End quote ---
The same thing happens in the Original Firmware so I don't think there is a way the Rockbox developers can fix this.

There should be added a new Option "Backlight while recording" the the LCD Settings menu. ;)

rp:
shame on me!

didn't check if the OF has this behavior too, and you are true, just checked that.

so it's no rockbox bug, sorry

Chronon:
It would be slick if you could add this signal back in with a Pi phase shift to cancel it out (e.g. noise cancellation).

Vortex:
I think it would be easier to simply turn off the backlight while recording, or rather set the backlight timeout to 1s or something like that. I know that this would be a workaround and not a fix but when dealing with hardware limitations a workaround might be the only solution.

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