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I am trying to get into live music recording and i am using my iRiver with RockBox and REP. I recorded my first show and have a little problem. I am a total techno-retard, as you will see, so bear with me.
I used the "Live" AGC setting, and i was under the impression that it would adjust the gain to the correct level "automataically," so i didn't make any changes to the initial gain settings, which were somwhere around 0. I was seeing the meters work, so i figured all was fine. I didn't realize how slow the gain would increase, so now my recording gets gradually louder, eventually reaching the optimum level after about 20 minutes.
What should I set the gain for to start out if i am recording a moderately loud rock show?
How can you tell what the peak meters are reaching? There are no numbers on the meters.How do i know what dB level to set the clipping limit for?
Finally, and this is non-RockBox related, but if anyone could help it would be great, is there any way i can correct this using Sound Forge? I have that but don't really know how to use it for something like that and i couldn't find any support for it. I think the Graphic Dynamics effect is what i want, but i can't figure out the settings (threshold, ratio, attack, release). anybody know where there is a good explanation of that?
Try normalizing the file before splitting the tracks.
Set the gain of the pre-amp so that your signal reaches around 0dB with the gain on your iriver set to 10dB, that gives you 10dB headroom the AGC-safety can use.
As far as salvaging the existing recording - 'tis a good lesson on why to stay away from AGC if possible (the only time i use agc is in a situation where i know I won't be able to check levels - i set safety agc just in case I've set the levels too high).Its going to be a pain in the arse to bring the levels back up. The only time I've had to do this was when I adjusted levels manually in the middle of a set. I knew how much gain I'd applied so I simpy normalised the "pre-gain" quiet section by that amount , then did a crossfade between the two. Took a bit of fiddling. Would hate to have to do this over multiple incremental gain increases, but as far as I can see that's what you'd have to do.
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  )? 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.
I've got myself a preamp based on quality specs, not gain levels, so no help there
QuoteI've got myself a preamp based on quality specs, not gain levels, so no help therei'm sorry, but, what you mean with "based on quality, not gain levels" ?
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