Recording issue
in [Live Sound]
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From: Michael Dobony on 3 Jan 2010 17:47 While not a recording NG, I figure someone here might have some insight to a problem I discovered. We record the praise and worship and also the sermons. I have never noticed a problem with the sermon CD's, but was asked to do some of the songs from worship for our small group. After ripping the CD with Media Player 11 I combined the tracks (automatically split every 5 minutes) in Total Recorder 8 and then split them into separate songs. The volume level was low, but no problem. MP3Gain will fix that! This is when I discovered that all the tracks are clipping! I thought that was strange considering the low volume level. My initial thought was that there was a problem with some individual channel gains. I have noticed in the past that someone messes around with levels during the week. I checked the channels today (it was my turn to run sound) and everything was fine on every channel. All the levels throughout the system were good and nowhere near clipping. We record directly to a Marantz CD recorder from Group 1 on a wye cable to the stereo inputs on the CD player and set the level to hit red only on occasion and only on the heavy passages. I also ran the record levels a little lower today and again every track is clipping. A-B comparison between the CD and the MP3 file show no difference between them. the unaltered MP3 levels are at about 90 db, but the volume seems low. This also seems to be common after talking to someone who works with the recordings every week. Any thoughts on where the problem might be? My only thought is the CD recorder. I may set up my laptop to record directly to MP3 next week. Mike D.
From: Krooburg Science on 3 Jan 2010 21:15 On Jan 3, 2:47 pm, Michael Dobony <sur...(a)stopassaultnow.net> wrote: > While not a recording NG, I figure someone here might have some insight to > a problem I discovered. We record the praise and worship and also the > sermons. I have never noticed a problem with the sermon CD's, but was asked > to do some of the songs from worship for our small group. After ripping the > CD with Media Player 11 I combined the tracks (automatically split every 5 > minutes) in Total Recorder 8 and then split them into separate songs. The > volume level was low, but no problem. MP3Gain will fix that! This is when I > discovered that all the tracks are clipping! I thought that was strange > considering the low volume level. My initial thought was that there was a > problem with some individual channel gains. I have noticed in the past that > someone messes around with levels during the week. I checked the channels > today (it was my turn to run sound) and everything was fine on every > channel. All the levels throughout the system were good and nowhere near > clipping. We record directly to a Marantz CD recorder from Group 1 on a wye > cable to the stereo inputs on the CD player and set the level to hit red > only on occasion and only on the heavy passages. I also ran the record > levels a little lower today and again every track is clipping. A-B > comparison between the CD and the MP3 file show no difference between them. > the unaltered MP3 levels are at about 90 db, but the volume seems low. This > also seems to be common after talking to someone who works with the > recordings every week. Any thoughts on where the problem might be? My only > thought is the CD recorder. I may set up my laptop to record directly to > MP3 next week. > > Mike D. Problem 1#: you should not be using a Y cable to sum channels. One output tries to drive the other since both are low impedance. You should only drive high impedance inputs. The result can be distortion and potential damage to the output circuit. Problem #2. It sounds like you have a phase or polarity problem between the 2 channels. Once combined to mono, channels with flipped polarity will cancel out signals common to both channels. If there's a phase shift, it can cause comb filtering and partial cancellation. K.
From: Phil Allison on 3 Jan 2010 22:47 "Krooburg Science" Problem 1#: you should not be using a Y cable to sum channels. ** The OP is not doing that. His Y lead links L and R inputs. ..... Phil
From: liquidator on 3 Jan 2010 23:10 "Phil Allison" <phil_a(a)tpg.com.au> wrote in message news:7qd6nhFd3fU1(a)mid.individual.net... > > "Krooburg Science" > > Problem 1#: you should not be using a Y cable to sum channels. > > ** The OP is not doing that. > > His Y lead links L and R inputs. > > > .... Phil > That was my uderstanding...he's basically just recording dual mono.
From: Tim Perry on 4 Jan 2010 00:59
"Michael Dobony" <survey(a)stopassaultnow.net> wrote in message news:nwikt68n6d0w.8efffljt78w8$.dlg(a)40tude.net... > While not a recording NG, I figure someone here might have some insight to > a problem I discovered. We record the praise and worship and also the > sermons. I have never noticed a problem with the sermon CD's, but was > asked > to do some of the songs from worship for our small group. After ripping > the > CD with Media Player 11 I combined the tracks (automatically split every 5 > minutes) in Total Recorder 8 and then split them into separate songs. The > volume level was low, but no problem. MP3Gain will fix that! This is when > I > discovered that all the tracks are clipping! I thought that was strange > considering the low volume level. My initial thought was that there was a > problem with some individual channel gains. I have noticed in the past > that > someone messes around with levels during the week. I checked the channels > today (it was my turn to run sound) and everything was fine on every > channel. All the levels throughout the system were good and nowhere near > clipping. We record directly to a Marantz CD recorder from Group 1 on a > wye > cable to the stereo inputs on the CD player and set the level to hit red > only on occasion and only on the heavy passages. I also ran the record > levels a little lower today and again every track is clipping. A-B > comparison between the CD and the MP3 file show no difference between > them. > the unaltered MP3 levels are at about 90 db, but the volume seems low. > This > also seems to be common after talking to someone who works with the > recordings every week. Any thoughts on where the problem might be? My only > thought is the CD recorder. I may set up my laptop to record directly to > MP3 next week. > > Mike D. 1: put a 10dB pad between mixer and recorder. Set record levels to never peak. 2: rip to wave and edit in wave. convert to MP3 at the last step. |