From analogue-request@magnus.acs.ohio-state.edu Tue May 11 11:08:05 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA14295; Tue, 11 May 93 11:05:58 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from nic.lth.se by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA14287; Tue, 11 May 93 11:05:55 -0400 Received: from axisab.axis.se by mail.lth.se with bsmtp (Smail3.1.28.1 #2) id m0nsvtl-000MTzC; Tue, 11 May 93 17:05 MET DST Received: by axisab.axis.se (/\==/\ Smail3.1.25.1 #25.6) id ; Tue, 11 May 93 15:38 MET DST Message-Id: From: ricard@axis.se (Ricard Wolf) Date: Tue, 11 May 93 15:38:30 MET DST X-Mailer: Mail User's Shell (7.0.1 12/13/89) To: "John A Tuffen" , ANALOGUE@magnus.acs.ohio-state.edu (analogue) Subject: Re: CV Sequencers ??? Status: OR > > You're in the UK, right ?? Try 'Electronic Synthesizer Construction' > > by R.A Penfold (Babani Press BP185, ISBN 0-85934-159-3). This is a great > > little book, and in the last chapter is a design for a really simple analog > > sequencer using a 555 timer and a 4017 and a few other bits. Should be > > *really* cheap to build, if you're into it !! The book is only available in > > the UK and Ireland, so if you can't find it, I can send or fax you the > > necessary bits. > > > I've been trying to get hold of this book for AGES - I think that it is > currently out of print... I was actually thinking of building a small > sequencer based on the 4017. I was just going to attach a pot to each of > the ten outputs and feed them into a summing amp... Am I close? Very. "Practical Electronics" once ran a project for a 16/8 step sequencer using this method. Must have back around 1978? 1980? or something. /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 -- "When will it flow all the way, when will it be, when ?" -- From analogue-request@magnus.acs.ohio-state.edu Fri May 14 23:04:07 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA22148; Fri, 14 May 93 23:03:31 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from att-out.att.com by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA22143; Fri, 14 May 93 23:03:29 -0400 From: wbf@aluxpo.att.com Received: from alux1.cnet.att.com by aluxpo (4.1/DCS-aluxpo-040293) id AA04229; Fri, 14 May 93 09:56:09 EDT Received: by alux1.cnet.att.com (4.1/DCS-aluxpo_client-022293) id AA06034; Fri, 14 May 93 09:56:08 EDT Date: Fri, 14 May 93 09:56:08 EDT Original-From: aluxpo!wbf (William Fox) Message-Id: <9305141356.AA06034@alux1.cnet.att.com> To: analogue@magnus.acs.ohio-state.edu Subject: Re: MIDI -> CV/Gate Status: OR Mikael Hillborg: > Can anyone give me a tip of how to construct a > midi to cv converter? Mikael, if you want to construct your own, this answer won't help you. But Seth, not knowing anything about your SH-1000, let me suggest you consider Clarity's Retro MIDI->CV/gate device. I know it seems silly to pay $500 or more to control a $90 synth but it can control multiple units as it has eight outputs. Each output can be user configured as CV or gate. I've been lusting after this device for a long time but other priorities keep popping up that prevent me from getting one. I do plan to get one to control my three moogs as it supposedly has a deep MIDI implementation. Clarity is the company that designed Lexicon's MRC and they advertise in the classified section of Keyboard magazine. Good luck! Bill Fox From analogue-request@magnus.acs.ohio-state.edu Fri May 14 21:34:58 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA20664; Fri, 14 May 93 21:34:38 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from SILVER.LCS.MIT.EDU by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA20659; Fri, 14 May 93 21:34:36 -0400 Received: by silver.lcs.mit.edu id AA19662; Fri, 14 May 93 21:34:31 -0400 Date: Fri, 14 May 93 21:34:31 -0400 From: jna@silver.lcs.mit.edu (you better start doin' it right) Message-Id: <9305150134.AA19662@silver.lcs.mit.edu> To: jat@ohm.york.ac.uk, peterc@comm.mot.com Subject: Re: midi -> cv Cc: ANALOGUE@magnus.acs.ohio-state.edu Status: O 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 From analogue-request@magnus.acs.ohio-state.edu Fri May 14 12:06:29 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA25945; Fri, 14 May 93 12:03:27 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from motgate.mot.com by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA25940; Fri, 14 May 93 12:03:23 -0400 Received: from pobox.mot.com ([129.188.137.100]) by motgate.mot.com with SMTP (5.65c/IDA-1.4.4/MOT-2.14 for ) id AA04373; Fri, 14 May 1993 11:03:20 -0500 Received: from comm.mot.com (il02dns1.comm.mot.com) by pobox.mot.com with SMTP (5.65c/IDA-1.4.4/MOT-2.14) id AA03965; Fri, 14 May 1993 11:03:19 -0500 Received: from dub-tse (dub-tsw1.comm.mot.com) by comm.mot.com (4.1/SMI-4.0) id AA29499; Fri, 14 May 93 11:05:52 CDT Message-Id: <9305141605.AA29499@comm.mot.com> Received: by dub-tse (16.6/16.2) id AA25627; Fri, 14 May 93 16:59:08 +0100 From: Peter Cassidy Subject: Re: midi -> cv To: jat@ohm.york.ac.uk (John A Tuffen) Date: Fri, 14 May 93 16:59:06 BST Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) In-Reply-To: ; from "John A Tuffen" at May 14, 93 4:05 pm Mailer: Elm [revision: 66.25] Status: OR > Well, the interface isn't really that complicated, based on a 6402 UART, > a bunch of TTL logic and some d/a converters. > > I was going to decode things like modulation and breath controllers, but > I decided that it would be far too much hassle so I am now converting.... > > Note pitch and velocity, > Pitch bend, > Channel Aftertouch, > Polyphonic Aftertouch, > The one I'm working on is an eight channel one, using one 6402 UART and one DAC (CV info only at the moment). What I have to do is multiplex the DAC, as eight of the things would be, like, 50 quid. The analog CV signal will be sent to one of eight sample-and-hold circuits, an op-amp. So far, I have one channel working, and I am decoding eight channels, so now I have to gate the note byte into the DAC, determine the channel, wait the DAC integration time, and shoot the analog signal into the S/H. Of course, the gate pulse would also have to be decoded from the note on/off and sent to the correct channel. Anyway, this is what I'm *trying* to do. Anyone any ideas / suggestions ?? My only concern is that the DAC mightn't be fast enough for eight channels. -- 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 | ------------------------------------------------------------------------------ From analogue-request@magnus.acs.ohio-state.edu Sat May 15 12:16:17 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA29715; Sat, 15 May 93 12:15:28 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from glenlivet.ohm.york.ac.uk by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA29710; Sat, 15 May 93 12:15:26 -0400 Received: by glenlivet.ohm.york.ac.uk (/\==/\ Smail3.1.28.1 #28.41) id m0nuOtE-000F0GC; Sat, 15 May 93 17:15:12 +0100 (BST) Message-Id: From: "John A Tuffen" Subject: Re: midi -> cv To: 70531.2124@CompuServe.COM (dennis barton) Date: Sat, 15 May 1993 17:15:12 +0100 (BST) Cc: ANALOGUE@magnus.acs.ohio-state.edu (analogue) In-Reply-To: <930515024950_70531.2124_FHH50-2@CompuServe.COM> from "dennis barton" at May 14, 93 10:49:50 pm X-Mailer: ELM [version 2.4 PL20] Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 648 Status: OR According to dennis barton: > > You might want it to also support MIDI *continue* messages. I have to switch > my sequencer to not send MIDI *continue* as my sync box doesn't suppoort it. > If I dont, I have to restart my sequences from the begining each time or > else the sync box wont start. > > This screws up my ability to have my MIDI drum machine playing in song mode. > > > > > Hope that makes sense! (g) Yes it does make sense ... My sync extractor does in fact work with continue messages - my '606 can be run from cubase, starting /stopping /continuing etc. without missing a beat (well, until I wrote this it did!) john.. From analogue-request@magnus.acs.ohio-state.edu Fri May 14 04:40:38 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA12316; Fri, 14 May 93 04:39:12 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from glenlivet.ohm.york.ac.uk by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA12311; Fri, 14 May 93 04:39:09 -0400 Received: by glenlivet.ohm.york.ac.uk (/\==/\ Smail3.1.28.1 #28.41) id m0ntvGe-000EzxC; Fri, 14 May 93 09:37:24 +0100 (BST) Message-Id: From: "John A Tuffen" Subject: Re: midi -> cv To: peterc@comm.mot.com (Peter Cassidy) Date: Fri, 14 May 1993 09:37:24 +0100 (BST) Cc: ANALOGUE@magnus.acs.ohio-state.edu (analogue) In-Reply-To: <9305140810.AA10346@comm.mot.com> from "Peter Cassidy" at May 14, 93 09:03:40 am X-Mailer: ELM [version 2.4 PL20] Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 757 Status: OR > 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. My MIDI->Cv converter is nearly there! When complete, it will: Be switchable to receive on one of MIDI channels 1-8, Receive both bytes of MIDI messages - converting to CV, Handle running status, Extract DIN-Sync24 (including run/stop). At the moment it's on veroboard/breadboard, but I'm going to collapse the logic into a PAL and produce a PCB, to reduce the board size and wiring. I was going to produce this as a semi-commercial venture though... john.. From analogue-request@magnus.acs.ohio-state.edu Fri May 14 04:09:25 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA11841; Fri, 14 May 93 04:07:59 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from motgate.mot.com by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA11836; Fri, 14 May 93 04:07:55 -0400 Received: from pobox.mot.com ([129.188.137.100]) by motgate.mot.com with SMTP (5.65c/IDA-1.4.4/MOT-2.14 for ) id AA23209; Fri, 14 May 1993 03:07:53 -0500 Received: from comm.mot.com (il02dns1.comm.mot.com) by pobox.mot.com with SMTP (5.65c/IDA-1.4.4/MOT-2.14) id AA12813; Fri, 14 May 1993 03:07:52 -0500 Received: from dub-tse (dub-tsw1.comm.mot.com) by comm.mot.com (4.1/SMI-4.0) id AA10346; Fri, 14 May 93 03:10:23 CDT Message-Id: <9305140810.AA10346@comm.mot.com> Received: by dub-tse (16.6/16.2) id AA22153; Fri, 14 May 93 09:03:42 +0100 From: Peter Cassidy Subject: Re: midi -> cv To: Mikael.Hillborg@eua.ericsson.se (Mikael Hillborg) (Mikael Hillborg) Date: Fri, 14 May 93 9:03:40 BST Cc: ANALOGUE@magnus.acs.ohio-state.edu (Analogue Mail List) In-Reply-To: <9305140748.AA28329@euas21c07.eua.ericsson.se>; from "Mikael Hillborg" at May 14, 93 9:48 am Mailer: Elm [revision: 66.25] Status: OR > Hi! > > Can anyone give me a tip of how to construct a > midi to cv converter ? It should convert > to logarithmic cv (Korg ms-20). > It shouldn't be difficult. It could be done > without a microprocessor by first converting > the serial data to parallell and then feeding > it into some kind of sequential circuit and then > thru a logarithmic DAC or so. > Am I right ? > I have a drawing in one of Penfold's books (I think it > is MIDI-projects) but I do not like it because it has > a static pulslength. When you send a note on to the circuit > it converts it to a controlvoltage and activates the trigger > for a specific time. Note off is not recognised. Another > minus is that this construction uses some old components which > are hard to get here in Sweden. > > Can anyone supply an ASCII-drawing of a better design ? > > /Mikael Hillborg, Computer Science, University of Uppsala, Sweden > email: mikhil@student.docs.uu.se 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. -- 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 | ------------------------------------------------------------------------------ From analogue-request@magnus.acs.ohio-state.edu Fri May 14 03:51:03 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA11457; Fri, 14 May 93 03:49:25 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from mailgate.ericsson.se by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA11448; Fri, 14 May 93 03:49:01 -0400 Received: from eua.ericsson.se by mailgate.ericsson.se (4.1/SMI-4.1-MAILGATE1.13) id AA25320; Fri, 14 May 93 09:48:48 +0200 Received: from ms.eua.ericsson.se by eua.ericsson.se (4.1/EUA-2.1) id AA18014; Fri, 14 May 93 09:48:47 +0200 Received: from euas21c07.eua.ericsson.se by ms.eua.ericsson.se (4.1/MS-2.1) id AA08095; Fri, 14 May 93 09:48:45 +0200 From: Mikael.Hillborg@eua.ericsson.se (Mikael Hillborg) Received: by euas21c07.eua.ericsson.se (4.1/client-1.3) id AA28329; Fri, 14 May 93 09:48:37 +0200 Date: Fri, 14 May 93 09:48:37 +0200 Message-Id: <9305140748.AA28329@euas21c07.eua.ericsson.se> To: analogue@magnus.acs.ohio-state.edu Subject: midi -> cv Status: OR Hi! Can anyone give me a tip of how to construct a midi to cv converter ? It should convert to logarithmic cv (Korg ms-20). It shouldn't be difficult. It could be done without a microprocessor by first converting the serial data to parallell and then feeding it into some kind of sequential circuit and then thru a logarithmic DAC or so. Am I right ? I have a drawing in one of Penfold's books (I think it is MIDI-projects) but I do not like it because it has a static pulslength. When you send a note on to the circuit it converts it to a controlvoltage and activates the trigger for a specific time. Note off is not recognised. Another minus is that this construction uses some old components which are hard to get here in Sweden. Can anyone supply an ASCII-drawing of a better design ? /Mikael Hillborg, Computer Science, University of Uppsala, Sweden email: mikhil@student.docs.uu.se From analogue-request@magnus.acs.ohio-state.edu Fri May 14 11:06:49 1993 Received: by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA22935; Fri, 14 May 93 11:05:20 -0400 Errors-To: analogue-request@magnus.acs.ohio-state.edu Sender: analogue-request@magnus.acs.ohio-state.edu Received: from glenlivet.ohm.york.ac.uk by quark.magnus.acs.ohio-state.edu (5.65/3.910213) id AA22929; Fri, 14 May 93 11:05:17 -0400 Received: by glenlivet.ohm.york.ac.uk (/\==/\ Smail3.1.28.1 #28.41) id m0nu1Jt-000F0OC; Fri, 14 May 93 16:05:09 +0100 (BST) Message-Id: From: "John A Tuffen" Subject: Re: midi -> cv To: andrea@sihp03.si.estec.esa.nl (Andrea TONI) Date: Fri, 14 May 1993 16:05:06 +0100 (BST) Cc: ANALOGUE@magnus.acs.ohio-state.edu (analogue) In-Reply-To: from "Andrea TONI" at May 14, 93 11:39:02 am X-Mailer: ELM [version 2.4 PL20] Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 866 Status: OR > > I was going to produce this as a semi-commercial venture > > though... > > john.. > > Hi, > WOuld you mind send some more tech details about this .. > or if you are going to sell it .. how much should we expect to pay for it ?? > Thnx in advance .. Well, the interface isn't really that complicated, based on a 6402 UART, a bunch of TTL logic and some d/a converters. I was going to decode things like modulation and breath controllers, but I decided that it would be far too much hassle so I am now converting.... Note pitch and velocity, Pitch bend, Channel Aftertouch, Polyphonic Aftertouch, Also (after a fashion) Controller numbers, Program changes. As for the price, well I'm hoping to keep it as low as possible (much lower than Kenton et. al.) - hopefully around the 50 pound mark (but this is by no means a definite price). O.K. ? john..