Support and General Use > Recording
Strange noises when recording to mp3
Davide-NYC:
--- Quote from: BigBambi on May 23, 2008, 11:04:58 AM ---
--- Quote from: Davide-NYC on May 23, 2008, 10:18:42 AM --- crappy target with even crappier recording support (which I fully endorse, the more target supported the better)
--- End quote ---
There really is no need for this. You may not like certain targets, but plenty of people do.
--- End quote ---
Look, shame on Sandisk for releasing a unit with an ADC that only does 22k and a design flaw that introduces DC offset. This is shoddy R&D and quality control on their part. DC offset with induced noise and 22k max samplerate is a deal-breaker for me and maybe OP would *NOT* have purchased the C2x0 series had they known of these flaws before hand. Caveat emptor!
My comment had nothing to do with Rockbox and everything to do with concluding to folks that are looking at the C2x0 series as a recording target (for portability probably) that the hardware is limited. For recording meetings and voice notes it'll be great. (I'm thinking about buying one as a 'loaner' device for meetings/classes I cannot attend.) But if you care about audio quality you may want to look elsewhere. (H120)
That said, the idea of implementing an optional DC-Offset filter for targets that need it might be a cool idea but it seems like it's trying to correct something that is inherently flawed.
Llorean:
The target isn't designed as a recorder though. Calling it a "crappy target" because one of its features (a VOICE recorder for use with the internal mic only) doesn't meet your requirements is overdoing it.
The player itself handles MP3 playback quite fine, and it's very tiny and light. It has MicroSD allowing for practically unlimited storage/variety despite its tiny size. And to boot it has FM radio in case you'd like to sample local culture. His point was that calling it a crappy target over one minor feature that wasn't even an intended selling point of the hardware is somewhat ridiculous. It's not sold as a real recorder, it's sold as having voice recording out of the mic, and even natively records to a VERY low quality file. I don't see anything that suggests that they want to convince users that it's a high quality, or even mid-quality, recorder. It's not a recording target. It's just a player that has some recording features.
Improving flawed hardware is kinda what we do here. Or would you argue against us trying to fix the remote ticking problem in the H120?
lee321987:
Good news. I just upgraded to r17687, and now when recording directly to mp3 the noise (that I started this subject for) is gone, AND the DC offset appears to be completely gone too (for mp3s).
If I first record a wav, and then (on my player) use "Open with..." > "mp3_encoder", the offset IS present, but still - not the noise!)
I assume the fix was due to the changes at r17679.
Thanks again to the Rockbox team.
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