Support and General Use > Audio Playback, Database and Playlists
Ipod gen 5.5, made capless output mod, don't have the max output swing
saratoga:
--- Quote from: decebal on December 27, 2017, 04:44:40 PM ---But at those stock levels, the values are expressed directly in the datasheet. No need to measure anything. The gain in volume/quality is real, and quantified in the datasheet. I
--- End quote ---
Ha, good one.
no_one:
Anyway, I set mine to 3.3V just for the heck of it. If it sounds the same, I'll lower it to 2.5V for battery reasons.
I'm stuck. Maybe digital volume on the data is set lower somehow? Can that data be digitally attenuated somehow?
no_one:
Oops :-[
My bad. I was using an attenuated 1khz audio file.
I generated a full swing 1khz signal in Audacity and tested again. It's all there!
So this is solved now.
Thing to note: if you want more clean swing + theoretically better SQ, go with 3.0V or 3.3V on DAC chip. Battery will suffer noticeably.
Saratoga, thx for your help so far, and sorry for stressing you. It was my mistake.
Rockbox ROCKS! :)
Spiralman:
Hi! I was interested to do a capless mod for video 5.5G ipod, but found myself completely noob in compiling firmware with modded driver.... Re-routing all connections on PCB isn't a problem. Can anyone share a latest beta firmware file with capless modified driver + 3.0V or 3.3V mod on DAC chip (as i am using huge slim battery with iflash micro-sd adapter). Thanks!
saratoga:
--- Quote from: Spiralman on October 02, 2019, 08:45:34 AM ---Hi! I was interested to do a capless mod for video 5.5G ipod, but found myself completely noob in compiling firmware with modded driver.... Re-routing all connections on PCB isn't a problem. Can anyone share a latest beta firmware file with capless modified driver + 3.0V or 3.3V mod on DAC chip (as i am using huge slim battery with iflash micro-sd adapter). Thanks!
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The normal build should work fine. The changes discussed here just raise the volume by a little less than 2dB and are fairly pointless.
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