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Pro-Ject Debut III USB Preamp Advice
Engelsstaub
post May 10 2012, 16:13
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I have the turntable mentioned in the title. I suppose it's no big news that the USB-out is sometimes too loud (no gain adjustment) with some vinyl (which results in clipping,) especially nearly every double-LP I own. Much to my dismay it also happens with a few regular ones like my mint original-pressing Black Sabbath "Mob Rules." For about 70% of my LPs it's fine, though "limited" to 16-bit resolution for recording.

My questions are these:

Would it be feasible to use something like the M-Audio Firewire Solo Amazon to record my needledrops from the preamp's RCA-outs to my Macintosh? (I'm using VinylStudio and it's pretty great IME.) If so, would I be able to effectively do so at 24-bit? (I don't imagine I hear any difference, but would like to do so for editing purposes.)

Any recommendations/good advice is greatly appreciated. (I wish I had researched this TT before I bought it. I'm considering trading it in later and getting a regular Debut III or something else in their line-up for under 800 USD...that's just not going to happen anytime really soon. I'm otherwise pleased with this TT's performance, so I wouldn't mind coming up with a good workaround. I get great results with many records and the hardware/software combingation.)

Pretty new to digitizing vinyl, so please forgive my ignorance.


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The Loudness War is over. Now it's a hopeless occupation.
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AndyH-ha
post May 15 2012, 21:36
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According to the manufacturer's literature, the Tascam does have an input level adjustment. The same is used for both the microphone and the line level inputs. This probably makes the microphone capabilities somewhat limited but should be what you need for your recording. It can't hurt to make certain that it is indeed analogue, but an on-board adjustment in the digital domain, considering that this is a USB device, would be pretty sophisticated for the price, and would be unlikely to work for a microphone.

A fixed attenuator would work ok, if you knew how much attenuation you needed. That will have to be determined by trial and error. The preamp output can't be that hot however. It is quite possible that if you just put 3dB attenuators at the output of your TT preamp, any line-level ADC input would work (but, of course, more than 3dB might be necessary).

If you look at the "other items" partway down that Amazon page, you will find similar attenuators by another company that will do the same job for only $4.50. There is also a Koss adjustable volume control that might be adequate.

The Tascam has balanced 1/4" phono jack inputs. Balanced is irrelevant for you purposes, but you will need RCA to 1/4" phono cables (very common, such as the Hosa cables in the "other items" on the Amazon SM-Pro page. (Hosa is not the best choice for long-term reliability, but you don't need the high price end cables either.)). Using the Koss with its 1/8" I/O will complicate things somewhat.

You will also find other, less expensive passive volume adjustment devices listed on the SM-Pro page.
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Posts in this topic
- Engelsstaub   Pro-Ject Debut III USB Preamp Advice   May 10 2012, 16:13
- - Apesbrain   Absolutely, so long as you run the TT line level o...   May 10 2012, 20:30
- - mixminus1   @Apesbrain: The OP's turntable has a preamp bu...   May 10 2012, 20:35
- - Engelsstaub   Thanks for the replies. Apesbrain: yeah, this part...   May 10 2012, 22:46
- - AndyH-ha   Clipping via the USB connection is caused by the a...   May 11 2012, 01:54
|- - Engelsstaub   QUOTE (AndyH-ha @ May 10 2012, 19:54...   May 11 2012, 03:09
- - mixminus1   No, Andy's saying that the outputs of the inte...   May 11 2012, 03:42
- - AndyH-ha   "it would have to be a VERY hot phono pre...   May 11 2012, 04:55
- - Engelsstaub   mixminus1: my Mac is a late 2010 13" MacBook ...   May 11 2012, 16:45
- - AndyH-ha   I can be of only limited help here but you should ...   May 11 2012, 20:53
- - AndyH-ha   The possibility also exist that you might not have...   May 11 2012, 20:59
- - Apesbrain   @OP, I now understand and I'm sorry for the mi...   May 11 2012, 21:06
- - Engelsstaub   Well, I do have a RCA-to1/8" cable that I use...   May 12 2012, 02:28
- - AndyH-ha   "I adjusted the volume to max out at around 9...   May 12 2012, 03:18
- - Engelsstaub   Nah, I had it turned all the way up on the Mac...   May 12 2012, 04:09
- - AndyH-ha   It seems rather strange that a recording applicati...   May 12 2012, 06:55
- - punkrockdude   What cartridge is it on the turntable? Just asking...   May 12 2012, 14:39
- - Engelsstaub   punkrockdude: it's the stock Ortofon OM5e that...   May 12 2012, 14:57
- - AndyH-ha   QUOTE I'm gathering from everything you've...   May 12 2012, 20:52
- - Engelsstaub   Alright. Thanks for your reply and your patience, ...   May 12 2012, 21:39
- - AndyH-ha   Have you determined that you get clipping using yo...   May 12 2012, 23:16
- - Engelsstaub   Yes, this and a few other records seem to clip in ...   May 13 2012, 00:18
- - Arnold B. Krueger   QUOTE (Engelsstaub @ May 10 2012, 11:13) ...   May 14 2012, 12:59
|- - Engelsstaub   QUOTE (Arnold B. Krueger @ May 14 2012, 06...   May 14 2012, 15:18
- - dhromed   QUOTE Audacity has a clipping indicator. I'm w...   May 14 2012, 15:33
- - Engelsstaub   Oh, ok, Thanks, dhromed. I think I understand how...   May 14 2012, 16:27
- - AndyH-ha   If you were looking at music that had been mastere...   May 15 2012, 03:18
- - Engelsstaub   Hey, AndyH (or anybody else reading) ...as long as...   May 15 2012, 18:05
- - AndyH-ha   According to the manufacturer's literature, th...   May 15 2012, 21:36
- - Engelsstaub   Great. Thanks for your help, Andy (and also everyo...   May 16 2012, 01:19


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