DSP emulations of different 'classic rock amps'

rick57 · 21st February 2003, 06:40 AM

http://johnson-amp.com/jstation.htm
has a choice of eg 24 amp "emulations" etc, including Marshall, Vox etc!
For $140 on a switchable basis, say a tape loop, maybe would be fun (depends on the subtlety and controllability or otherwise).
(Line 6, Behringer etc also do them)

In a home sytem, it might do least signal degradation routing digital out from CD into such a beast, doing its DSP, then going into a DAC.
You would probably only do it on mediocre quality rock recordings, but that's many of them.

What do you think?

jackinnj · 21st February 2003, 12:35 PM

he did a series of experiments for audio magazine writers in which, viewing the amp or preamp as a black-box, he emulated the sound of several highly expensive devices with much less expensive modifications of Hafler amps.

rick57 · 23rd February 2003, 05:21 AM

Filtering on a computer is the way with greatest flexibility.
The Johnson ‘J Station’ I mentioned is intended to run off a PC sound card in a home recoding studio. It doesn’t accept digital in, but it’s only $140, and I’m sure something else would eg from Line 6 or Behringer. Behringer is perhaps the price leader.

The field of DSPs is continually expanding, and DACs and ADCs are a lot better for less $ than a few years ago. Not the commercial products, but the evaluation boards.

Audiophile digital crossovers are (I think) pretty new – one was developed (last year?) for the Linkwitz Phoenix. Digital crossovers could be used in conjunction with DSPs.
Anyone know of other recent digital crossover developments?

Mark Hayenga · 23rd February 2003, 06:55 AM

I am developing a loudspeaker system with DSP based crossovers for a senior electrical engineering project this semester. Should have results by end of May

Mark

rfbrw · 23rd February 2003, 09:39 AM

Meridian have had digital x-overs for at least the last 10 years. The first digital room correction system I can remember appeared around 10 years ago as well.

ray.

rick57 · 24th February 2003, 12:56 AM

When I said "Audiophile digital crossovers are (I think) pretty new" I should have said in the diy realm, rather than in big bucks (Meridian) league.
Anyone built one successfully?

TIA

rick57 · 28th February 2003, 11:43 AM

A much better choice than the aforementioned J station, would be the Boss VF-1 (by Roland).
It does 20 emulations, and includes a 10 band EQ, with some parametric options.
24 bit in & out. 30 bit internally.

dimitri · 28th February 2003, 12:47 PM

to mark: I hope you will put your project on http://www.hayenga.com/mark/

to rick57: Here is some links http://www.geocities.com/john_wr2000/links.htm
but it seems that there are no practical realisations. The only one crossower (working) is in LSPpro software ($500) and as another option I am waiting for Behringer dcx 2496 ($400).

rick57 · 2nd March 2003, 01:22 AM

There's also the dbx driverack PA:
http://www.driverack.com/PA.htm c. $Us 500
I'm told it sound better than the behringer DCX 2496

Thanks. I'll check those links

21st February 2003, 06:40 AM	#1
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	DSP emulations of different 'classic rock amps' http://johnson-amp.com/jstation.htm has a choice of eg 24 amp "emulations" etc, including Marshall, Vox etc! For $140 on a switchable basis, say a tape loop, maybe would be fun (depends on the subtlety and controllability or otherwise). (Line 6, Behringer etc also do them) In a home sytem, it might do least signal degradation routing digital out from CD into such a beast, doing its DSP, then going into a DAC. You would probably only do it on mediocre quality rock recordings, but that's many of them. What do you think?

21st February 2003, 12:35 PM	#2
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Didn't Hafler do this in the 80's he did a series of experiments for audio magazine writers in which, viewing the amp or preamp as a black-box, he emulated the sound of several highly expensive devices with much less expensive modifications of Hafler amps.

23rd February 2003, 05:21 AM	#3
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Parrallel digital crossover developments Filtering on a computer is the way with greatest flexibility. The Johnson ‘J Station’ I mentioned is intended to run off a PC sound card in a home recoding studio. It doesn’t accept digital in, but it’s only $140, and I’m sure something else would eg from Line 6 or Behringer. Behringer is perhaps the price leader. The field of DSPs is continually expanding, and DACs and ADCs are a lot better for less $ than a few years ago. Not the commercial products, but the evaluation boards. Audiophile digital crossovers are (I think) pretty new – one was developed (last year?) for the Linkwitz Phoenix. Digital crossovers could be used in conjunction with DSPs. Anyone know of other recent digital crossover developments?

24th February 2003, 12:56 AM	#6
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	diy digital crossovers When I said "Audiophile digital crossovers are (I think) pretty new" I should have said in the diy realm, rather than in big bucks (Meridian) league. Anyone built one successfully? TIA

28th February 2003, 11:43 AM	#7
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	suitable, with EQ A much better choice than the aforementioned J station, would be the Boss VF-1 (by Roland). It does 20 emulations, and includes a 10 band EQ, with some parametric options. 24 bit in & out. 30 bit internally.


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23rd February 2003, 06:55 AM	#4
Mark Hayenga diyAudio Member Join Date: Dec 2002 Location: USA	I am developing a loudspeaker system with DSP based crossovers for a senior electrical engineering project this semester. Should have results by end of May Mark

23rd February 2003, 09:39 AM	#5
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Meridian have had digital x-overs for at least the last 10 years. The first digital room correction system I can remember appeared around 10 years ago as well. ray.

28th February 2003, 12:47 PM	#8
dimitri diyAudio Member Join Date: Oct 2002 Location: retired	to mark: I hope you will put your project on http://www.hayenga.com/mark/ to rick57: Here is some links http://www.geocities.com/john_wr2000/links.htm but it seems that there are no practical realisations. The only one crossower (working) is in LSPpro software ($500) and as another option I am waiting for Behringer dcx 2496 ($400).

2nd March 2003, 01:22 AM	#9
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Digital xover There's also the dbx driverack PA: http://www.driverack.com/PA.htm c. $Us 500 I'm told it sound better than the behringer DCX 2496 Thanks. I'll check those links

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