DavidJr
Head-Fier
- Joined
- Mar 24, 2002
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So.. any of you think there's any chance of rockbox being enhanced to support PlaysForSure?
Originally Posted by DavidJr So.. any of you think there's any chance of rockbox being enhanced to support PlaysForSure? |
Originally Posted by hekoman nope, never gonna happen. |
Originally Posted by dpippel I can deal with UI glitches/omissions, rough edges here and there, etc., but Rockbox on the 5G still sounds like $hit compared to Apple's stock firmware IMO. FLAC support doesn't mean squat to me if my MP3s sound better AND I can use Apple's superior UI. I'll be willing to play as soon as the bedrock issues (read SQ problems) are ironed out, but I think the iPod port of Rockbox has some miles to go yet. |
Originally Posted by linuxstb Firstly, are you using a recent build of Rockbox? I fixed the initial "mono and distorted" audio bug in Rockbox on the 5G on the 20 February, and since then no-one has complained about the audio quality. If your audio problems remain when using a current version, can you please provide more detail - preferably as a bug report on the Rockbox bug tracker: http://www.rockbox.org/bugs/ Thanks. |
Originally Posted by greenleaves except that seeking in FLAC remains partially implemented. |
Originally Posted by linuxstb Firstly, are you using a recent build of Rockbox? I fixed the initial "mono and distorted" audio bug in Rockbox on the 5G on the 20 February, and since then no-one has complained about the audio quality. If your audio problems remain when using a current version, can you please provide more detail - preferably as a bug report on the Rockbox bug tracker: http://www.rockbox.org/bugs/ Thanks. |
Originally Posted by dpippel Thank you for inquiring! I installed the 3/1 build yesterday and things are improved over the previous build I was using, which could have been prior to your fix. However, I still find audio quality with the 5G/Rockbox lacking compared to the 5G running Apple's firmware. Rockbox is harsher and seems to clip occasionally on both FLAC and 256K VBR LAME MP3 files. I'm also finding that some themes cause the audio to pause and stutter. The comparison was made with no sound modifications and no EQ on a 30GB 5G running Apple's 1/10 firmware. |
Originally Posted by greenleaves According to one of the posters that said "The 5G lineout is variable under Rockbox. In other words the iPod's volume control affects the lineout volume." This raises a concern of the quality of the lineout because the signals still go through the iPod internal amp where we want to bypass for an external headphone amp. Is that the case? In the case of the optical lineout in iRiver H-120, the volume control is bypassed. It would be nice to see a similar implementation in the iPod lineout. I am sure many of us here are keen to see such to happen too. |
Originally Posted by linuxstb I'm not worried about the occasional pauses and stutters - this is simply because under certain circumstances Rockbox isn't decoding the audio fast enough to maintain real-time playback. This will improve as the various parts of Rockbox are optimised. |
Originally Posted by linuxstb Please don't take this the wrong way, but saying that Rockbox is "harsher and seems to clip" doesn't help me debug... Does it definitely clip? If so, at what volume are you listening at, and are you listening via the line-out or headphone-out? |
Originally Posted by linuxstb We don't have a datasheet for the specific DAC in the 5G, but so far it has appeared to be identical to the WM8983 - which has a datasheet is available here: http://www.wolfsonmicro.com/uploads/.../en/WM8983.pdf If you look at the Audio Signal Paths diagram on page 12, you will see how the line-out (LOUT2/ROUT2) are connected to DACs. You will see that it is not possible to bypass LOUT2VOL and ROUT2VOL - all we can do is set the gain to 0dB, which is what you can do yourself by setting the overall Rockbox volume to 0dB. |
Originally Posted by greenleaves Thanks for the information. I did a few checks to confirm in the case of the iPod firmware that the volume control is actually bypassed in the line-out. It is not true, however, in the case of Rockbox. Either the iPod firmware automatically turns off the volume control in the line-out or the actual DAC in 5G is different from what the WM8983 datasheet has shown or perhaps some other possibilities that could prop up. Surely further investigation is needed. |
Originally Posted by linuxstb The volume control for the headphone out and line out are controlled independently. The Apple firmware appears to fix the line out at 0dB and the user volume setting is only applied to the headphone out, and Rockbox adjusts both line-out and headphone-out together. But I'm interested in feedback - should Rockbox fix the line-out at 0dB (as the Apple firmware appears to), or does anyone find it useful to be able to adjust the gain on the line-out? |