mbira

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About mbira

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    MIDIbox Newbie
  • Birthday 01/01/1970

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  1. Awesome! Lee, you mentioned you are using a minimal setup for the processor. Do you have a link to the minimal setup? This will live in the instrument, so the less I need, the better. I have 5V coming off of the megadrum (schematic), and I can tie in to the MIDI coming directly out of the atmega and 6N138N.
  2. Great. Thanks for the thorough reply! I haven't yet done enough research on the components-to be sure I understand-so the currently loaded samples in the bank get loaded into memory on the processor? Are you having to read from the SD card during performance other than when changing banks? Does that only take a few secons or a few minutes? Just making sure this will work for us on stage...Have you measured latency? Regarding stereo, maybe I can modify the code to have half the polyphony and send two samples for every hit...
  3. Hi guys, I was sent to this thread, as I think I'm looking for something like this. Please pardon my newbie ignorance-I have experience building audio gear - preamps, compressors, tube amps, etc, but I'm still pretty new with this type of stuff. I built a Megadrum, and I use it to convert audio signals to Midifrom marimbas where I put piezos in the keys. Right now, the megadrum is feeding my computer via USB and I am using Reason synth sounds. I'd like to build an onboard hardware sample solution on each marimba and ditch the computer. I was sent here, but I'm confused if the specs I need would work if I build this. My soprano marimba has 21 keys. I want to sample each key with at least 4 layers of velocity: 21 x 4 = 84 samples I then would like to be able to store at least four patches of sounds. So will this sampler let me store 336 stereo (stereo isn't essential, but would be nice) samples at 44.1/16 bit if each sample were an average of one second (some would be longer, but most would be shorter. I only need I think 6 notes of polyphony at the most (we only use two mallets at a time). Can I switch between the four banks of sound with the push of a button? Sorry again about coming in with so many questions. I've read over the thread, and I'm afraid I just don't know enough yet to answer these questions... PS: if you're interested in seeing what I'm talking about in action, here's a live video from a show we were recently playing (using Reason as the sound module).
  4. Hi folks, I have a band where we play hand-build Zimbabwean style marimbas. In these marimbas, I have piezo triggers in each key and those feed a Megadrum audio->midi converter and go via USB into my computer. I control synth sounds there using Reason and Ableton. I'd like to take things to the next level and have an internal sound card built on each marimba and then just go Audio out of the marimba. I know most of the commercial offerings have a General Midi sound library, but I'm wondering if there is a way to build something where I can load my own samples to use? Any advice on something like that? i don't want some big rack sampler when you can use a little daughterboard like HERE to achieve what I want...any thoughts? So far I have the Audio to midi conversion piece, now I just need the midi to sample to D/A piece. :)
  5. Midibox CV schematic?

    Thanks so much, nebula! I love the modular nature of this, and it's great that the core module is used in all the projects.
  6. Midibox CV schematic?

    Hi folks, I'm looking into building the midiboxCV. Is there a schematic somewhere? I don't see it on the details page. Also, (and I understand if these are not available), but has anyone come up with a bom or artwork for the layout of the boards? I'm a home-etcher, so I'll be hopefully building these using through-hole parts...
  7. Wonderful! Awesome! Amazing! :smile: I will begin the building process, and once I'm ready to get help on this, I'll get back in touch. Thanks so much. :)
  8. Hi Thorsten, Thanks for your reply. I do know the tunings I need. That said, all I'm trying to discern at this point is IF midiboxCV will achieve what I need it to do? I'm not asking you to give me the full solution right now :) I just want to know if I should be going down the path of building one. I think you are saying it's possible, but it'd be easiest for you to add the tunings to the code yourself. Is that correct? Is switching between tuning tables something I can do live on stage with something like a switch-or how would that work? Thanks!
  9. Is there some other part of the forum that I should be asking this question? Does midibox CV support tuning tables? Can I switch between them in live performance? Thanks!
  10. Hifolks, I am new here. I am building a lunchbox size modular synth, and I need a midi to cv module. The thing is, I play three main tunings-one regular western scale, and two other tunings that are very different-including stretched non-linear octaves, etc. I need to be able to switch from these tunings from song to song. Is there a way to achieve this with the midiboxCV? I have seen that you can change your tuning with the cv_curve_table1.inc file, but I'm wondering if there is a way to store three of those files and toggle between them? If not, is my only hope to build three different midi to cv converters? Thanks! Joel
  11. Thanks for the replies guys.  The megadrum looks good and well documented.  I etched the boards this evening and plan on placing a mouser order soon...It looks like the programming can also be done with a serial port-which is nice!
  12. Thanks for the reply.  I emailed the admin over there a few months back and got no reply...I tried again this last week and still no reply.  I have a feeling that he must be busy.  The difficulty is compounded by the fact that I need many less featuress than his kit offers... I want 24 channels of mono. I'm not much of a kit guy...have always done DIY from the ground up, though if there was a way to get the digital components I'd be game. My biggest concern is the digital aspect of things, and that's pretty out of my domain.  I'd need to find a way to get the PICs burned with the firmware that I need...
  13. Hi guys, I'm new to this forum, though I see some familiar faces from the Group DIY site.  I'm pretty much a midi newbe, so forgive me.... I built midi triggers that are activated through piezo pickups and convert to midi via the Alesis Trigger io. It works great, but it is only 8 channels.  I want at least 24, and I don't want to have to spend another $300 for two more Alesis boxes...especially if I can build something into a 1U rack space. I have seen this page: http://www.edrum.info/ And I saw this (analog board for 8 mono inputs): http://www.edrum.info/files/eDrum16_analog_v0_6.pdf But there's very little activity over on that forum, so I don't want to go too far along on a project that isn't well supported... Any advice? PS: it would be really great to have this be connected to the computer via USB...