id m0nufrw-000F0GC; Sun, 16 May 93 11:23:00 +0100 (BST) From: "John A Tuffen" Subject: Re: midi -> cv Date: Sun, 16 May 1993 11:23:00 +0100 (BST) > From silver.lcs.mit.edu!jna Sat May 15 02:34:42 1993 > I realize you guys are trying to provide a cheap way of doing midi to cv, > but don't you think you're going to be up around $200 anyhow if you start > including all your R&D / labor to construct a circuit w/o a microprocessor? > > In any case, it's a noble hack. (bows) > > -john > Well yes (and no) I want a MIDI to CV/Gate converter for my own use. I'm going to build it anyway. So, once I've built it there is no reason why I shouldn't share the benefits(?) with everyone else who doesn't want to pay through the nose for such a device. (BTW - it's nearly there!! CV is done, just the Gate extraction to solder!) john.. (Smail3.1.28.1 #2) id m0nvQ2y-000MTzC; Tue, 18 May 93 13:41 MET DST id ; Tue, 18 May 93 10:11 MET DST From: ricard@axis.se (Ricard Wolf) Date: Tue, 18 May 93 10:11:37 MET DST Mikael.Hillborg@eua.ericsson.se (Mikael Hillborg) (Mikael Hillborg) Subject: Re: midi -> cv Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) > I'm working on Penfold's design, to detect NOTE-OFF information at the > moment !! I think though, somebody out there has already done this. > Also, I'm trying to extract velocity information and use this to feed a VCA > which I will send the synth's audio through. Can anyone help. Is this the hardwired design with a 6402 UART and no CPU? Interesting concept, I have the book somewhere at home, but it is rather limited. On the other hand, using a single-chip CPU like the 68HC11 requires some sort of development system, although you can do a lot more that way. /Ricard -- Ricard Wolf / | \ / | /- email: ricard@axis.se Axis Communications AB /__| \/ | \__ uucp: axisab.se!ricard S - 223 70 LUND / | /\ | \ Tel: +46 46 19 18 63 SWEDEN / | / \ | \__/ Fax: +46 46 13 61 30 -- "Sie ist ein Modell und sie sieht gut aus" -- (Smail3.1.28.1 #2) id m0nvQ3M-000MTzC; Tue, 18 May 93 13:41 MET DST id ; Tue, 18 May 93 10:58 MET DST From: ricard@axis.se (Ricard Wolf) Date: Tue, 18 May 93 10:58:41 MET DST Subject: Re: midi -> cv Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) > My only concern is that the DAC mightn't be fast enough for eight channels. That shouldn't be a problem: in my polysynth the DAC updates 18 EG's per millisecond and has no problems with that (it's an AD7521/PM7541 12-bitter). /Ricard -- Ricard Wolf / | \ / | /- email: ricard@axis.se Axis Communications AB /__| \/ | \__ uucp: axisab.se!ricard S - 223 70 LUND / | /\ | \ Tel: +46 46 19 18 63 SWEDEN / | / \ | \__/ Fax: +46 46 13 61 30 -- "Sie ist ein Modell und sie sieht gut aus" -- Date: Tue, 25 May 1993 05:34:22 -0400 From: tmm@world.std.com (Tom M Moravansky) Subject: CV -> MIDI converter Are there any other MIDI->CV converters that also go the other way? I know the Serge MIDI-CV also goes CV->MIDI. I think it wuld be a useful feature and it wouldn't apear to be that difficult. The application I was thinking of was using an analog sequencer to drive a sampler loaded w. percussive sounds, bass sounds, effects, etc. From: Peter Cassidy Subject: Re: Roland CV to Korg CV and Sync 24 Query Date: Fri, 11 Jun 93 7:44:45 BST Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) Mailer: Elm [revision: 66.25] > > > BTW : Errm. I think Yamaha CS series is Volts/Octave. > > Nope, the CS-5, CS-10 etc all use linear CV. I know, I tried connecting > an MS-10 and a CS-5 together once. Result? Ok, tracked beautifully, except > that the range was far off, so that connecting them one way resulted in > a pitch several octaves too high, and the other way several octaves too low. > But they were still in tune though. Hmmmm.And I always thought it was log output, because the CS5 I'm using is connected to a Korg SQ10 & it never really worked well. Thanks for the info as this will have major implications for a MIDI-CV/Gate adaptor I'm working on!! > > -- > Ricard Wolf / | \ / | /- email: ricard@axis.se > -- Regards, Peter ------------------------------------------------------------------------------ | M O T O R O L A B . V . I R E L A N D | | ----------------------------------------- | | Peter Cassidy - T.S.E Dublin | Phone : 353-1-840-8866 Ext. 417 | | MACCVM : C10404 | X400 : peterc@comm.mot.com | ------------------------------------------------------------------------------ id AB15910; Fri, 11 Jun 93 02:42:36 -0400 Date: Fri, 11 Jun 93 15:42:22 JST From: steve@crl.hitachi.co.jp (Steven Collins) Return-Path: Subject: Re: Roland CV to Korg CV and Sync 24 Query >Nope, the CS-5, CS-10 etc all use linear CV. I've never heard of the CS-10, just CS-5, CS-15 and CS-30 (all of which I own). Is there a CS-10 as well....? steve --- +-------------------------------------+----------------------------------------+ | Steven Collins, Visiting Researcher | email: steve@crl.hitachi.co.jp | | Hitachi Central Research Lab. Tokyo | ph: (0423)-23-1111 fax: (0423) 27-7742 | +-------------------------------------+----------------------------------------+ (Smail3.1.28.1 #2) id m0o42he-000MUdC; Fri, 11 Jun 93 08:35 MET DST id ; Fri, 11 Jun 93 08:34 MET DST From: ricard@axis.se (Ricard Wolf) Date: Fri, 11 Jun 93 08:34:10 MET DST Subject: Re: Roland CV to Korg CV and Sync 24 Query Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) > BTW : Errm. I think Yamaha CS series is Volts/Octave. Nope, the CS-5, CS-10 etc all use linear CV. I know, I tried connecting an MS-10 and a CS-5 together once. Result? Ok, tracked beautifully, except that the range was far off, so that connecting them one way resulted in a pitch several octaves too high, and the other way several octaves too low. But they were still in tune though. /Ricard -- Ricard Wolf / | \ / | /- email: ricard@axis.se Axis Communications AB /__| \/ | \__ uucp: axisab.se!ricard S - 223 70 LUND / | /\ | \ Tel: +46 46 19 18 63 SWEDEN / | / \ | \__/ Fax: +46 46 13 61 30 (Smail3.1.28.1 #2) id m0o42fR-000MUdC; Fri, 11 Jun 93 08:32 MET DST id ; Fri, 11 Jun 93 08:31 MET DST From: ricard@axis.se (Ricard Wolf) Date: Fri, 11 Jun 93 08:31:50 MET DST Romeo Fahl , analogue@magnus.acs.ohio-state.edu Subject: Re: Roland CV to Korg CV and Sync 24 Query > > In message <9306101806.AA29207@goren1.u.washington.edu>you write: > > > > > A friend of mine just bought a Korg MS10, and an MC202 is on the way. How > > can he use the second CV channel on the 202 to sequence the MS10. > > I guess he can't. The MC202 uses the standard 1 V/octave control voltage > (like Moog and ARP use), while the MS10 and MS20 use a linear V/Hz control > voltage. I remember vaguely that Korg at one time made a conversion box for > this, in about the same period as the MS series were built. I've noticed that the MS-10 and MS-20 oscillators have an oscillator modulation input labeled 1V/oct. While I suspect it's not true 1V/oct, it might be accurate enough for a couple of octaves. Anyone have any experiance with this - connecting a sequencer to the osc CV mod input? /Ricard -- Ricard Wolf / | \ / | /- email: ricard@axis.se Axis Communications AB /__| \/ | \__ uucp: axisab.se!ricard S - 223 70 LUND / | /\ | \ Tel: +46 46 19 18 63 SWEDEN / | / \ | \__/ Fax: +46 46 13 61 30 From: Peter Cassidy Subject: Re: Roland CV to Korg CV and Sync 24 Query Date: Fri, 11 Jun 93 7:08:25 BST Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) Mailer: Elm [revision: 66.25] > > > > > A friend of mine just bought a Korg MS10, and an MC202 is on the way. How > > can he use the second CV channel on the 202 to sequence the MS10. > > I guess he can't. The MC202 uses the standard 1 V/octave control voltage > (like Moog and ARP use), while the MS10 and MS20 use a linear V/Hz control > voltage. I remember vaguely that Korg at one time made a conversion box for > this, in about the same period as the MS series were built. > > Since Kenton makes midi-to-cv transformers that can deal with the linear > control voltages --- which by the way are also used by Yamaha CS synths --- > a possibility would be: > > MC-202 -> cv-to-midi -> midi-to-cv -> MS-10 Sounds like a simple log-lin voltage convertor will do the trick. Some kind of op-amp convertor may work. I have a schematic for a log to lin convertor using a CA3046 and a 741, if it's any use. I can post it as an ASCII-matic! > > --- Peter de Waal, CWI, Amsterdam --- > BTW : Errm. I think Yamaha CS series is Volts/Octave. -- Regards, Peter ------------------------------------------------------------------------------ | M O T O R O L A B . V . I R E L A N D | | ----------------------------------------- | | Peter Cassidy - T.S.E Dublin | Phone : 353-1-840-8866 Ext. 417 | | MACCVM : C10404 | X400 : peterc@comm.mot.com | ------------------------------------------------------------------------------ Subject: Re: Roland CV to Korg CV and Sync 24 Query <9306101806.AA29207@goren1.u.washington.edu> Date: Thu, 10 Jun 1993 21:31:05 +0200 From: Peter de Waal In message <9306101806.AA29207@goren1.u.washington.edu>you write: > > A friend of mine just bought a Korg MS10, and an MC202 is on the way. How > can he use the second CV channel on the 202 to sequence the MS10. I guess he can't. The MC202 uses the standard 1 V/octave control voltage (like Moog and ARP use), while the MS10 and MS20 use a linear V/Hz control voltage. I remember vaguely that Korg at one time made a conversion box for this, in about the same period as the MS series were built. Since Kenton makes midi-to-cv transformers that can deal with the linear control voltages --- which by the way are also used by Yamaha CS synths --- a possibility would be: MC-202 -> cv-to-midi -> midi-to-cv -> MS-10 but that sounds like financial and electronic overkill, and it might even be illegal to post such a proposition on an analog mailing list. --- Peter de Waal, CWI, Amsterdam --- Subject: Re: Roland CV to Korg CV and Sync 24 Query <9306101806.AA29207@goren1.u.washington.edu> Date: Thu, 10 Jun 1993 21:31:05 +0200 From: Peter de Waal In message <9306101806.AA29207@goren1.u.washington.edu>you write: > > A friend of mine just bought a Korg MS10, and an MC202 is on the way. How > can he use the second CV channel on the 202 to sequence the MS10. I guess he can't. The MC202 uses the standard 1 V/octave control voltage (like Moog and ARP use), while the MS10 and MS20 use a linear V/Hz control voltage. I remember vaguely that Korg at one time made a conversion box for this, in about the same period as the MS series were built. Since Kenton makes midi-to-cv transformers that can deal with the linear control voltages --- which by the way are also used by Yamaha CS synths --- a possibility would be: MC-202 -> cv-to-midi -> midi-to-cv -> MS-10 but that sounds like financial and electronic overkill, and it might even be illegal to post such a proposition on an analog mailing list. --- Peter de Waal, CWI, Amsterdam ---