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Mono with a stereo stylus
tinpanalley
post Jul 9 2011, 22:08
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I'm not going to buy a mono stylus for my cartridge. I don't even know if they make one. My question however is about the software.

Should I bother setting my software (I have Sound Forge and Audacity) to mono recording? Or should I just record my mono vinyl in stereo and then decide what to do with the 2 channels? There has to be some standard way of recording mono via a stereo stylus.

Thanks for any input!
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AndyH-ha
post Jul 10 2011, 01:43
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There is a definite advantage to recording "stereo." It is true that sometimes one channel is better than the other (and this isn't necessarily constant; you may need to pick and choose from each channel, using copy and paste to make one best) but most often you can make use of the fact that you have two, out of phase with each other. Automated declicking works better against both of the channels (rather than first converting to mono, then declicking), as does decrackling (decrackling is more likely to be desirable with the older mono disks than with newer, probably in better condition, LPs).

After declicking, convert to mono. This in itself will remove, or greatly reduce, a large number of clicks . They are partly, or more or less completely, out of phase with each other and cancel. The same is true with a lot of the background broadband noise. Its level will be decreased significantly by converting to mono. All this assumes the phono cartridge is properly aligned to allow it.

I don't know what Sound Forge provides. In CoolEdit/Audition there is a channel mixer that, properly used, gives the net mono in one channel and the removed difference in the other. I find this frequently helpful during the manual declicking stage. Canceled clicks (partially or fully) are in the removed channel and align with their former position in the music. Those that are only partially removed can be seen much easier, telling you where more work needs to be done (if the click isn't completely removed from the music). If you are going to do only manual declicking, this arraignment may be even more helpful.

I use this two channel form for the rest of the processing, right through converting to 16 bit. Then I convert the reject channel to silence and copy-paste the good channel into it. Both channels are now identical, even to the dither. It is ready to write to CD-R and it gives the smallest possible file size when converted to FLAC.
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- tinpanalley   Mono with a stereo stylus   Jul 9 2011, 22:08
- - mixminus1   QUOTE (tinpanalley @ Jul 9 2011, 14:08) O...   Jul 9 2011, 22:55
- - tinpanalley   Ok, that's what I thought. Then do I double it...   Jul 9 2011, 23:02
|- - mixminus1   QUOTE (tinpanalley @ Jul 9 2011, 15:02) O...   Jul 10 2011, 00:32
|- - tinpanalley   QUOTE (mixminus1 @ Jul 9 2011, 19:32) and...   Jul 10 2011, 01:34
|- - mixminus1   QUOTE (tinpanalley @ Jul 9 2011, 17:34) I...   Jul 10 2011, 02:32
- - Paul Sanders   If you plan to declick, record in stereo. Clicks ...   Jul 9 2011, 23:24
|- - tinpanalley   QUOTE (Paul Sanders @ Jul 9 2011, 18:24) ...   Jul 9 2011, 23:40
- - DonP   The surface noise is stereo too. If I record a mo...   Jul 10 2011, 00:32
- - AndyH-ha   There is a definite advantage to recording "s...   Jul 10 2011, 01:43
- - tinpanalley   I guess what I'm getting at, and perhaps this ...   Jul 10 2011, 02:58
|- - Martel   QUOTE (tinpanalley @ Jul 10 2011, 03:58) ...   Jul 10 2011, 19:06
- - tinpanalley   "converting to 16-bit" - is that the sam...   Jul 10 2011, 05:35
- - AndyH-ha   If you play a mono track from the computer it will...   Jul 10 2011, 06:06
- - AndyH-ha   Also, in the more specific case of an LP or casset...   Jul 10 2011, 06:12
- - Fedot L   QUOTE (tinpanalley @ Jul 9 2011, 21:08) I...   Jul 10 2011, 21:27
|- - tinpanalley   QUOTE (Fedot L @ Jul 10 2011, 16:27) Ther...   Jul 11 2011, 00:53
|- - 2Bdecided   QUOTE (Fedot L @ Jul 10 2011, 21:27) QUOT...   Jul 11 2011, 12:53
- - dc2bluelight   QUOTE (tinpanalley @ Jul 9 2011, 16:08) I...   Jul 11 2011, 07:20
|- - tinpanalley   QUOTE (dc2bluelight @ Jul 11 2011, 02:20)...   Jul 11 2011, 17:05
- - pdq   Think of it this way... A stereo cartridge genera...   Jul 11 2011, 17:48
- - 2Bdecided   100% of the wanted signal is horizontal motion. 5...   Jul 12 2011, 10:51
- - tinpanalley   Ok, I'm going to use Audacity to record my mon...   Jul 13 2011, 20:47
|- - DonP   QUOTE (tinpanalley @ Jul 13 2011, 15:47) ...   Jul 13 2011, 22:06
|- - Juha   QUOTE (tinpanalley @ Jul 13 2011, 22:47) ...   Aug 14 2011, 18:05
- - greynol   Record at 24-bit, make sure your editing software ...   Jul 13 2011, 21:11
- - AndyH-ha   Also, from the fairly large number of mono LPs I d...   Jul 13 2011, 23:17
- - AndyH-ha   If you don't know about the best way to decrac...   Jul 13 2011, 23:18
- - tinpanalley   Sorry to keep beating a dead horse over here but w...   Jul 29 2011, 00:26
- - DVDdoug   There was always a mono-FM switch, which would red...   Jul 29 2011, 01:27
- - AndyH-ha   Mono, usually adding the channels together, making...   Jul 29 2011, 05:51
- - Woodinville   If it is an old mono recording, you do not want to...   Jul 29 2011, 07:51
- - AndyH-ha   While that may be true, few recent cartridges have...   Jul 29 2011, 09:23
- - pdq   I was buying LPs in the mid 60's when they sol...   Jul 29 2011, 14:38
- - tinpanalley   Hey guys, Ok, so I ran some tests. Very elementar...   Jul 29 2011, 22:47
- - AndyH-ha   If the LP is good enough condition, and your cartr...   Jul 30 2011, 07:43
- - tinpanalley   I'm dealing with dithering now and realised so...   Aug 1 2011, 22:21


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