Interesting. I suppose one could verify this as follows:
1) Record an SQ signal from a test record such as Quadraphile or the Project 3 Quad Test LP (SQ) Version. Maybe like the tones that appear in each channel for 15-20 seconds. Record in stereo, leaving the SQ encoding intact.
2) Take the wav file into Sound Forge or some other wav editor. Edit out a few second from each tone in each channel, then insert the cut signal back into the same wave form at a different location within the original sound.
3) Record the resulted mixed up patched together SQ encoded wav file to a CD or DVD, in stereo still.
4) Play the CD or DVD back through a Tate or SM and listen.
It might be fun!! Maybe I will try it. If I do, I will report back with a new thread documenting the process and results.
Bit annoyed with myself I can't just post waveforms etc now to back it up (i stupidly didn't 'back it up'
)
because I could prove to you there is no detrimental effect on editing an SQ LP rip before decoding or after decoding, the results are the same.
I will redo a few comparison tracks over the weekend, since my 2nd to last Mac went bye bye's I had SQ transfers in 2-Ch with and without edits then decoded and the same SQ records decoded first with and without edits etc. Not many but a few.
Why did I have it both ways? Well, I found it much easier to transfer the SQ LPs in 2-channel, then decode them, than what I have been doing more recently which is play the 2Ch SQ and decode on rhe fly recording the decoded 4-channels in. It saves an entire process (so for a 45 minute album it used to take me 90 minutes in all to capture the 2-ch SQ and then decode those 2/SQ into 4/Quad.. whereas latterly it just takes 45 minutes to do the same 45 minute record). I'm probably explaining it really badly since I'm not technical but suffice it to say it takes half the time roughly when doing the process all in one go than it does to 1.) Record 2-CH SQ, 2.) Playback 2-CH SQ and decode into 4-CH, 3.) Edit and other processing etc.than it does 1.) Record decoded 4-CH, 2.) Edit and other processing.
Somebody on here posted to the effect that it is detrimental to the SQ decoding process if you click repair or edit the 2-channels before decoding and you should only edit and declick the resultant decoded 4-channel rendition and that's what I have been doing most of the time but it made things bloody difficult with manually click repairing since you've got not 2 but 4 sets of tracks to clean up and work on..!!
More recently I've been trying to get SQ LPs either sealed or in the best like NM condition I can find and that the records are as clean as clean can be (new machine helps Hoover the dust away! suck suck suck!) and then I just don't bother doing any or much click stuff etc., the bulk of the clicks left with these most recent things are in the bands of silence between tracks and I think some of those were always there inherent in the cutting where one track stopped and they stopped cutting and another track started so they started cutting again and that introduced clicks. Maybe..
anyway, so when doing them now I either fade in or fade out each song once the actual musical information in each tracks finished or use the amplify tool to lower the overall volume by it's max of -50db to make the bands of "silence" and the run in and run out grooves (usually clicks and noise with vinyl records)
more silent!
Ah.. time for a juicy hangover beer, I've given myself a headache! :upthumb