Recording Vinyl

The Stratmangler · Post by **The Stratmangler** » Thu Feb 03, 2011 11:37 pm

pre65 wrote:4-4 ?

Chocolate Noddy for that man - good guess Phil

And you didn't have any idea about who it was, did you ?

The clip is from the album Sheik Yerbouti, and the title track is The Sheik Yerbouti Tango.

pre65 · Post by **pre65** » Thu Feb 03, 2011 11:46 pm

The Stratmangler wrote:
pre65 wrote:4-4 ?
Chocolate Noddy for that man - good guess Phil
And you didn't have any idea about who it was, did you ?

The clip is from the album Sheik Yerbouti, and the title track is The Sheik Yerbouti Tango.

I didn't even listen to it !

I'm psychic.

(or is it psychiatric)

The Stratmangler · Post by **The Stratmangler** » Thu Feb 03, 2011 11:47 pm

Your problem Simon sounds very much like a computer on the edge of its abilities - how many apps does it load up on startup, and is it possible to stop a whole stack of them ?

CCleaner is your friend here

The Stratmangler · Post by **The Stratmangler** » Fri Feb 04, 2011 12:09 am

pre65 wrote:
The Stratmangler wrote:
pre65 wrote:4-4 ?
Chocolate Noddy for that man - good guess Phil
And you didn't have any idea about who it was, did you ?

The clip is from the album Sheik Yerbouti, and the title track is The Sheik Yerbouti Tango.
I didn't even listen to it !

I knew that all along.

However, I did not stipulate that you had to listen to the track

Had you listened to the track your response would have been quite different, and had you recognised where it was from you'd quite possibly have suggested 9/17 or something daft like that.....

pre65 wrote:I'm psychic. (or is it psychiatric)

Anyhow, according to DtB it's geriatric ............ Nurse........Nurse.....

pre65 · Post by **pre65** » Fri Feb 04, 2011 12:18 am

The Stratmangler wrote:

pre65 wrote:I'm psychic. (or is it psychiatric)
Anyhow, according to DtB it's geriatric ............ Nurse........Nurse.....

You have to laugh.

I could do with a Nurse right now.

Mike H · Post by **Mike H** » Fri Feb 04, 2011 3:01 pm

You can always do with a nurse!

"You've all done very well..."

Silence.wav as seen by CoolEdit Pro ~

That's a VERY low frequency wave form, about 3 Hz! Very large as well. Superimposed on this is a smaller 0.5 Hz component. The clicking suggests some circuit being pushed to clipping by the combination of these waveforms. Appears to happen when the 0.5 Hz goes to its positive peak.

Something somewhere has got low frequency instability and is oscillating at low LF.

Can't be heard in the normal course of events because it's well below the audible range.

Post by **Nick** » Fri Feb 04, 2011 3:12 pm

I would guess the 0.5Hz is record warp (33/60) = 0.55Hz

And the 3Hz could be the arm resonance.

Mike H · Post by **Mike H** » Fri Feb 04, 2011 3:28 pm

Not actual "silence" then?

Yet in the music version, the actual music part is miniscule by comparison. Just makes the lines look thicker:

Mike H · Post by **Mike H** » Fri Feb 04, 2011 3:29 pm

#2 ~ zoom in of a bit where it clips:

Post by **Nick** » Fri Feb 04, 2011 3:39 pm

I assume the silence is the captive track at the end of side, as it repeats every 1.9 sec making your turntable seem 4.5% slow. The higher frequency is exactly 5 times that rate, so I dont think its the phono stage oscilating on its own, I suspect it may be from the turntable. Maybe its a arm resonance being excited by the table rotation, but the fact its exactly 5 times, and repeats exactly makes me think its either in the LP (have you tried another one) or its the deck rumble. Whats the ratio of the idler to turntable size? and the phono stage is amplfying it as the stage has a response down that low.

simon · Post by **simon** » Fri Feb 04, 2011 8:27 pm

Ah. Good theory, but I should probably have been clearer. The silence track is with the phono plugged into the laptop but no record, arm on its rest. And it's an old DD.

simon wrote:This happens when the phono stage is connected directly to the laptop with no record playing, see the first screenshot.

When I play a record the music is superimposed on this clicking noise, and there seems to be some distortion on it too, or perhaps it's just the underlying problem that's cocking the signal up? See second screenshot.

simon · Post by **simon** » Fri Feb 04, 2011 8:30 pm

The Stratmangler wrote:Your problem Simon sounds very much like a computer on the edge of its abilities - how many apps does it load up on startup, and is it possible to stop a whole stack of them ?

CCleaner is your friend here

I'd be a bit surprised if that's the case, but maybe it is. I'll download CCleaner and see what happens.

cressy · Post by **cressy** » Fri Feb 04, 2011 8:41 pm

does the waveform show up if you put the phono stage into a scope? if its not on the scope trace then it must be the laptop id assume. obviously that assuming youve got a scope

floppybootstomp · Post by **floppybootstomp** » Fri Feb 04, 2011 8:59 pm

Not sure if this may help or not but I've been using dbPoweramp for about ten years to record line level signals to WAV or mp3.

Here's links to the earlier free version of it and the Auxillary Module which you'll need to record with. The main program rips to/from mp3/WAV/cda but doesn't do any other formats as it's quite old now.

Load the 'Conv' file first then the 'Aux'.

dbPowerAmp_Main

dbPowerAmp_Aux_Mod

It records to either WAV or mp3. Any questions, feel free to ask me. The files are on the web space I get with my ISP.

I have the new (paid for) version now which deals with more file formats including FLAC but which curiously doesn't have a line level record module.

simon · Post by **simon** » Sat Feb 05, 2011 6:09 pm

cressy wrote:obviously that assuming youve got a scope

I've got three scopes - the best of them lasted 20 minutes before going pear shaped

audio-talk

Recording Vinyl

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