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Drum Machine Query >> for Engineers
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Yidam
IsraTrance Full Member
Started Topics :
144
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3171
Posted : Mar 30, 2005 01:38
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I currently enrolled in a VHDL chip design/programming class which allows us to create our
own project for the end of the semester. I've chosen to create a drum machine
which simulates the beats of a drummer playing different genres of music.
Basically it is a microprocessor with 7 outputs, one for each drum in a kit. The module sends pulses corresponding to drum hits at intervals over each cable so as to
simulate a drum being played.
It looks something like this, but instead of the drum pads, i have my machine.
http://www.harmony-central.com/Pix/EDW/figure-MIDI-drums.gif
if you look at the diagram there is a trigger module which accepts pulses on the trigger drum sounds. cables and converts them to MIDI processed sounds.
My drum machine sends 5V spaced pulses on each of the 7 cables. What I'm looking for is a Trigger Module + Sound Module which would
accept this signal and convert it to an Audio output.
I know a lot of you are familair with MIDI interfaces and was wondering if you could help me find something that would work. I'm looking for either a readymade Module on the market or a Chip Schematic with Code which I can implement.
I have found a lot of drum processers but everything Ive found has more options than I need. I need something basic that fits this function.
IF theres anyone who can give me a little bit of insight on this I'd greatly appreciate it!
Thanks 10X in advance!!
http://www.harmony-central.com/Drums/EDW/Articles/MIDI-Introduction.html
has a bit more on what im working towards.
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Colin OOOD
Moderator
Started Topics :
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Posted : Mar 30, 2005 02:30
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Hayez
Started Topics :
8
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393
Posted : Mar 30, 2005 02:43
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The D4 from alesis is probably cheaper the the newer DM5. Looking in the specs, it looks like it have the same triggers.
 "a new art came into my mind which only you can create, the Art of Noises, the logical consequence of your marvelous innovations." Russolo, 1913 |
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Yidam
IsraTrance Full Member
Started Topics :
144
Posts :
3171
Posted : Mar 30, 2005 03:48
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Thanks a lot for the for the info Colin & Hayez... yeah I'd decided on the D5 earlier as well.
But im still stumped when it comes to the input signal this device needs. My microprocessor works with digital outputs. So at the end, each Drum of the kit is basically a Binary Output Signal that jumps to 1 when its simulating a 'hit' and is 0 otherwise. This is done for one clock cycle. I probably need a Digital to Analog converter to change this into a voltage jump, but im not sure how much of a voltage jump this device would need for proper accuracy. I'm not bothered about sensitivity (how hard you hit the pad) ... i just need constant sound outputs.
Thanks again. |
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Colin OOOD
Moderator
Started Topics :
95
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5380
Posted : Mar 30, 2005 05:33
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