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Iriver 1xx FM tuner low playback volume

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HorstIriver:
I can't turn up the volume any further because at 0dB, it sounds like -12dB in mp3-mode, at best. At FM, the volume does not depend on the reception strength, and it happens at all stations (about 20) that I get. Comparing it to the Iriver firmware, the iriver firmware is much louder. - 3 minutes later - I have just done a test. Because my hard drive is currently empty, the boot time is very short, and I could compare the sound volumes of both firmwares at the same station, while the same song was played. The Iriver firmware has a volume range from 0 to 40. If I set it to about 23, I get the volume of Rockbox at max. setting, 0dB. Another effect: Rockbox seems to find less stations. I am convinced that the FM receiver chip is configured differently in both firmwares. Is it possible to check the register contents of the chip while under Iriver control, and transfer the configuration to Rockbox? Does anybody have something like a Risk Watch to spy what the Iriver firmware does?

The reason why I mention all that radio stuff: I really want to use Rockbox as the only firmware, not only because of the station memory, I like all features very much, I am enthusiastic! I am far from critizising anybody of the Rockbox crew, they did an outstanding job, especially if you consider that they had no support from the manufacturer of the hardware. I know what I am talking about because I have been  computer hardware developer and simulation specialist for 25 years (IBM). If I had the time, I'd make myself familiar with the Rockbox project immediately, try to improve the FM part myself, and try to contribute to the project. Currently I can't, there are too many other things... therefore, at the moment, I can only ask for help.

JimmyRock:
I have the same issue, and I also mentioned it (among many others with the FM Tuner) in this post:

http://forums.rockbox.org/index.php?topic=6203.0

For the tuner volume, I'd request either:

1) Separate volume controls for FM and file playback,
2) An "FM Volume Adjust" option to change the FM volume relative to the main volume setting,
3) Or boosting the FM volume to correct levels in the firmware

Haven't gotten around to making a Feature Request yet (not too motivated to do so since it seems that not very many are considered).

bluebrother:

--- Quote from: JimmyRock on September 05, 2006, 01:24:28 PM ---Haven't gotten around to making a Feature Request yet (not too motivated to do so since it seems that not very many are considered).
--- End quote ---

There is already a request in the tracker. Also, this issue was already discussed on IRC. IIRC the consens was to go with 2), but better look it up in the logs ;-)

RaeNye:
I don't have a iriver so I might be talking nonsense here, but at first the X5 FM radio suffered from a similar problem, solved by setting the TLV320 line-in gain to 0dB (FM is muxed into the line-in input).

Maybe the respective change to the UDA1380 (or any other ADC/DAC chip the H1xx has) could solve your problem.

Maybe you can test it without coding by changing line in gain on recording screen.

JimmyRock:

--- Quote from: RaeNye on September 05, 2006, 06:37:45 PM ---I don't have a iriver so I might be talking nonsense here, but at first the X5 FM radio suffered from a similar problem, solved by setting the TLV320 line-in gain to 0dB (FM is muxed into the line-in input).

Maybe the respective change to the UDA1380 (or any other ADC/DAC chip the H1xx has) could solve your problem.

Maybe you can test it without coding by changing line in gain on recording screen.

--- End quote ---

I never use the recording options, but as far as I can tell, the gain is already set to 0.

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