Rockbox

  • Status Closed
  • Percent Complete
    100%
  • Task Type Bugs
  • Category Recording
  • Assigned To No-one
  • Operating System iAudio X5
  • Severity Low
  • Priority Very Low
  • Reported Version
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Rockbox
Opened by Rob - 2007-01-13

FS#6533 - Poor recording sound quality iAudio X5

Hi

I’m new to Rockbox - installed it this morning in response to issues with the original OS on the X5 I bought last summer.

The main reason for the OS change is so that I can use the X5 to record live gigs in wav format. [or any format with reasonable quality to be honest, since I’d found the sound quality of recordings on the X5 to be absolutely awful]

Now I’ve tried with Rockbox I’ve seen a major improvement, but the sound is still way off the quality you’d expect and I’m wondering if I’ve missed something simple - or maybe the X5 hardware is just crap.

The test recordings I made this morning looked to have good input levels, but still came out very quiet. When I grabbed the file via the USB cable and pulled it into Audition it looked tiny. When I normalised to CD levels there is an awful lot of background hiss (sample attached) - in fact it almost sounds like the kind of artefacts you get when noise reduction gets used on the transfer from a very hissy tape.

  1. Equipment: iAudio X5 running 12 Jan 07 daily build of Rockbox SW, Giant Squid stereo omni mics with bass rolloff and 9V power box that came with it
  1. Record Settings: wav, 44.1kHz, Line In, Stereo, Split at 2 hours, no pre-record time, default directory, clipping light off, trigger off
  1. Recording Screen Volume 6dB, Gain (L&R) 12dB

I’ve just done the same thing using my old Sony MD walkman and there is no hiss and much better bass response. [The reason for making the change is that the only way I have to get my recordings off the MD is via the headhone socket which introduces low level hiss to the recording and I’ve been trying to get away from that].

Any and all info/advice greatly appreciated.

Many thanks. Rob.

Closed by  Jonas Häggqvist
2007-01-14 05:13
Reason for closing:  Invalid
Additional comments about closing:  

This is not a feature request, but a support request. Support is given either on irc, the forums or the mailing list. See the menu on rockbox.org for details.

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