Support and General Use > Recording

Recording on ipod (was: nano recording volume)

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bot47:
Hi!

I just started recording using my iPod nano and current rockbox cvs using the headphone jacket, but it's REALLY quiet (but works) even though I used a quite powerful input. Is there any trick to make it record more usefully? Increasing the volume and the record gain does not help that much!

petur:
see commit 18 Dec 01:52 by Barry Wardell:


--- Quote ---FS#6096. Recording on PortalPlayer targets (H10, iPod Video, iPod 4g, iPod Color, iPod Nano). * Fix failed compile of enc_config.c when HAVE_MPEG2_SAMPR is not defined. * Fix bug in AIFF encoder header creation on little endian targets. * Add recording screen keymaps for H10 and iPod. * Move pcm_playback PP specific code to target tree. * Add recording code to wmcodec drivers. * Add pcm_record code. Some problems still remain: * Playback doesn't work after recording until Rockbox is restarted. * Gain control not implemented. * Only 16-bit/44KHz for now. The hardware should be capable of up to 24-bit/96KHz. * Line-in recording not tested on H10
--- End quote ---

linuxstb:
All evidence so far suggests recording doesn't work on the Nano.  It was enabled in CVS by mistake, and we decided to leave it just to try and confirm for sure that it doesn't work.

Are you sure it's working at all?  Do your recordings contain recognisable audio?

(I would be very happy to be proved wrong).

bot47:
Yes, they do. Do you want me to upload some?

barrywardell:
It looks like the mic through headphones socket has to be specifically enabled on  4g/color iPods through a GPIO port. I wonder if the same thing is the case for the nano? See pcm_init_recording() in firmware/target/arm/pcm-pp.c for an idea of what I mean.

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