Support and General Use > Recording
Tips on recording for a newbie
petur:
hmmm... I don't think normalizing individual songs is the way to go if you still want to listen to the concert as a whole....
Check the envelope tool of audacity, it allows you to gradually change gain, which is what you want to compensate the AGC
virelai:
Hy i'm an iriver ihp120-rockbox user too, and, the recording feature is the one i use the most, as i record daily university lesson (didn't have the occasion to try it on a live gig).
So,as i cannot check my input levels all the time, i have to set one input level at the beginning, and activate AGC. Till now i've only tried the "voice" agc mode as it is the faster, and because i usually set gain to nearly the maximum ( about 46 db). At this point my first question is:
Does the latest iriver hp120 firmware only allows input levels up to around 24 dbs (i'm using a december 06 firmware version)? And if yes, why the maximum input levels where lowered?
I have to point out that i'm just using the mic that came with the iriver, that i'm recording to mp3 format at 56 Kbps mono, so my goal here is not quality, but just avoid clipping, without being forced to keep my eyes on the peak meters.
Second question is: what kind of pre-amp gear are you using guys? Does it do the job? and, does the rockbox peak meter on the iriver take into account the pre-amp gain boosting (yes, i know,this is al really stupid question ;D )?
Third and last one: can any of you explain how the triggering thing works? Does it help somehow to avoid clipping? I had a hard time finding an explenation on the site,as the one in the manual is actually unavailable.
Thanks in advantage and bye! :)
petur:
--- Quote from: virelai on January 31, 2007, 05:15:00 PM ---Does the latest iriver hp120 firmware only allows input levels up to around 24 dbs (i'm using a december 06 firmware version)? And if yes, why the maximum input levels where lowered?
I have to point out that i'm just using the mic that came with the iriver, that i'm recording to mp3 format at 56 Kbps mono, so my goal here is not quality, but just avoid clipping, without being forced to keep my eyes on the peak meters.
Second question is: what kind of pre-amp gear are you using guys? Does it do the job? and, does the rockbox peak meter on the iriver take into account the pre-amp gain boosting (yes, i know,this is al really stupid question  ;D )?
Third and last one: can any of you explain how the triggering thing works? Does it help somehow to avoid clipping? I had a hard time finding an explenation on the site,as the one in the manual is actually unavailable.
--- End quote ---
1) rockbox enables the maximum gain range the hardware provides (unless a bug got in there) - my h340 (which has the same ADC as yours) goes up to +48dB
2) I've got myself a preamp based on quality specs, not gain levels, so no help there. You could also try to find a more sensitive directional mic. The peakmeters show the levels of the digital signal, after pre-amp and iriver gain.
3) triggering is for pausing and resuming recording based on levels, so only record if there's something to record, not the silent parts. May be of use to you...
virelai:
wow, that was so fast! thank you!
but, there's something i didn't get:
--- Quote ---I've got myself a preamp based on quality specs, not gain levels, so no help there
--- End quote ---
i'm sorry, but, what you mean with "based on quality, not gain levels" ? :-[
thank you
petur:
--- Quote from: virelai on January 31, 2007, 06:42:32 PM ---
--- Quote ---I've got myself a preamp based on quality specs, not gain levels, so no help there
--- End quote ---
i'm sorry, but, what you mean with "based on quality, not gain levels" ? :-[
--- End quote ---
I got a pre-amp that doesn't add so many extra dB gain as I don't need it (into rockconcerts too), but I looked more at the quality side of things (frequency response, distortion, noise floor, ...)
For your purpose (low quality voice recording) you'll probably have to look for a more sensitive mic and/or a pre-amp that has enough gain.
That's why I said I couldn't help you with a pre-amp, we have different targets to meet ;)
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