Time stretching/pitch shifting without DSP, possible or not? Options

[bennetng]

I mean time stretching without changing pitch and pitch shifting without changing speed.

I ask this because my friend recently purchased a turntable (Stanton ST150) and it has time stretch function.

http://www.stantondj.com/pdf/products/turn...t150_manual.pdf

The manual says

Note: This turntable has separate analog and digital circuits. If you are
looking for a purely analog signal, use the Phono output. For access to
the Key correction feature use the Line output or S/P DIF output.

Note: Key lock and Digital output
processing is only available when the LINE
output is used.

So from my common sense and English level (not my native language), the line out is in fact converted from digital. But my friend insisted on thinking that the processing is done in analog domain and said if EQ can be done in analog domain, why time stretching/ pitch shifting can't?

What is your opinion?

[bennetng]

but people are still fully convinced that the gear is analog and will sound better

Actually he said analog sounds much better than digital while listening through line out...

This post has been edited by bennetng: Sep 18 2012, 14:15

[dumdidum]

but people are still fully convinced that the gear is analog and will sound better

Actually he said analog sounds much better than digital while listening through line out...

the st-150 and str8-150 have two outputs, stereo RCA and s/pdif. there is a switch which allows you to select whether the RCAs output line-level or phono level.

when that switch is set to phono, the unit functions as nothing but a normal analog TT. no digital signal processing is going on, there is no amplification. when you set the switch to line, the signal goes through a phono preamp and time stretching may be applied.

iirc (but it's been a while since i've played with one of these), when using s/pdif, the "key lock" button also functions just as when using RCA and having the switch set to "line" (as opposed to "phono").

EDIT: i realize my posts don't really live up to the standard of the "scientific discussion" forum. i just wanted to say that (i) the st-150 indeed does time stretching digitally** and (ii) i don't think there is much value in having a discussion about the fidelity of "analog" sound with most DJs.

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** in fact, stanton advertises the unit as the ST.150 Digital Turntable.

This post has been edited by dumdidum: Sep 18 2012, 16:03