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Yannovitch

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Posts posted by Yannovitch

  2. Mega MidiBox LC

    in MIDIbox HUIs

    Posted

    Hello,

    I'm a french-native speaker, so excuse me for my mistakes.

    I would like to build a really big MidiBox LC, like a System5 from Euphonix, with 6 modules of 8 fader.

    I would like to have 8 pots with ring led for each fader, so I will have 64 pots on one "module" of 8 fader, 384 pots for all. 16 pots by fader would be slightly better , because I will have 4 EQ to control directly under my hand for example but 768 pots begin to be really expensive ^^

    I would like to have some touchscreen on this midibox, for that I will use an ARM, I'm using the "ARMadeus" project and it will be separate from the pic but I would like to interface them for some controls.

    I would like to have 2 joystick for 5.1 mix. Does someone have already coded and used a joystick for that ??

    I write this on the forum because I would like to have your opinion on this project . Do you think it's realizable ? How much do you think it will cost me approximatively ? How much time I will spent on this project ??

    Yann

  6. J'achète un midibox SEQ très rapidement / I want to buy very fastly a midibox SE

    in MIDIbox SEQ

    Posted

    Bonjour,

    Je cherche un midibox SEQ à acheter très rapidement (avant le 15 juin), si il y a qqun qui souhaiterait vendre la sienne en France de préférence, ou dans les pays limitrophes, je vous serais gré de m'en faire part par mail.

    Je sais que l'esprit est plutot DIY, et de construire la sienne, mais je suis pris par le temps !

    ( Je sais comment fonctionne les séquenceurs, y a pas de problème )

    -----------------------------------------------------------------------

    Hello,

    I would like to buy a midibox SEQ before June 15th, if someone want to sell his SEQ, preferably in France or Germany, Swiss, Spain, Italy, it would be nice to contact me by mail.

    I know that I'm supposed to build myself the SEQ, accordingly to the DIY philosophy, but I've not enough time ( and I know how a sequencer works, thanks ;)).

    Yann

  10. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Yep, A Midibox guru is in the place !! :D

    Thank you for your idea.

    The Shifty's Death Synth can make very interesting sounds :) ...

    Yeah, it's the Korg Kaoss Pad built into the Matthew Bellamy Guitar which have given to me the idea of having a touchscreen interface for my guitar :)

    Concerning the Wireless Midi, even if it's - maybe - more complicated, I prefer to have an inside built wifi interface, because a wifi driver is in the writing process for the uclinux for arm & cie ... So I will use this ... And imagine, with a usb key, if I want to jump with my guitar, op, the USB is unclipsed and no sound - oops :)

    Now I know what I want, after one day to compare and search, I will join the association near to my home, and use an ARM9 processor with linux embedded, not an AVR32, because we can find more things for ARM than for AVR32 and I've not enough time to developp myself all what I want to do.

    My question now is : has anyone tried to use an ARM instead of a PIC for the midibox ?

    Have you some onboard wireless chip to recommend ?

  11. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Hello,

    What I'm wondering is if you need some really powerful CPUs (like XScales, ARM9e and the likes) next to it to run it.

    Fortunately not. I don't know if you have this magazine in your country, but we have in the Elektor magazine of this month an example of USB which need normal AVR chip to run it http://www.elektor.fr/default.aspx?tabid=29&forumid=13&postid=5594&view=topic.

    My project take a new turn :

    I've found in the city of my school ( Mulhouse in Alsace in France ) an association who concentrate of the Linux embedded.

    http://www.armadeus.org/ .

    It run on ARM9 and Spartian FPGA . They have written some driver - a wifi driver is in project :) - and a community is created around this project.

    I've written to know if I can do AVR32 too, because the AVR32 is not really far in the conception of the iMX200 (ARM9).

    If we can find a compromise, i think i will agree to this community, it will maybe accelerate the guitar project :)

  14. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Yep, I like too the Sounds from Zara's dream :)

    I haven't found solution for the RF, but I've found a practical question for the midibox expert:

    I will use the normal solution for the MIOS & cie. But I want to interface a touchscreen controlled by the AVR32 ( it's too much for the PIC) to the Midibox. Does the Midibox allow this ? Controlling by a XYtouchpad instead of a sensor or a pot/fader ??

  15. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Okay,

    I understand better what's the concept.

    However, I don't want to need absolutely a computer with my guitar ...

    A friend has told me of the product of Zilog, has anyone heard about this product ???

    He said me too that it's utopic actually to want transmit multichannel audio by wireless, I will look at powerful RF chip, and if I'm not lucky, I will concentrate on the transmission by ethernet or ADAT ...

  16. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Very nice site cimo :)

    since i ve started playing with MB in guitars i don t play the guitar anymore!

    Yep that's the risk, but my mind is focused on this electronic challenge more that I play like a noob :) ...

    Can you explain in details what you used for the XY controller for the touchpad ?

    And what do you use for the USB controller to be completly plug and play ? I don't want to have USB impemented into my guitar but it can be an idea to have an USB2 into the wireless demodulator :) if I can have wireless on my guitar :) . And you speak about 64 mb on inside memory, but I haven't see a CF adaptor, so what do you use??

    Thanks :)

    Good luck in your project,

    Thank you, I will need it :D

    Anyone can just say me if I can go with the AVR32, or if it's a bad idea, and that I must absolutely do my project with more powerful DSP/MCU ?

  17. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    If you want to simplify a bit the design at first you could imagine of using an AL3101 as DSP to mix, EQ, filter the 8 mono inputs it can support and then have one mono output. With the available 1024 cycles the chip has, you would have 128 cycles per input channel and that is already quite comfortable.

    The system is running at 48kHz/24bits. It would be an A-to-D and D-to-A conversion but at least you could use at first a conventional wireless system made for guitarist. Then you would have a certain flexibility but also robustness and more rapid results than developping everything.

    Okay, I will see in more details what this DSP could exactly do :D

    If you plan to use ethernet or any other means to transport the ~22Mbps of data you need for all the channels, then the network should be pretty empty (I mean you should not connect that to your home network with media center and the likes on) otherwise you may end up with issues due to the packet collisions, the fact that every layer adds its overhead i.e. a 10Mbps network at the physical layer does not mean that you have those 10Mbps available at the applicative level, ... Anyway that's another story.

    I think you don't see exactly what I mean. Imagine more a guitar like the Gibson Digital to imagine what I think when I speak of Ethernet transmission ( http://www.gibson.com/DigitalGuitarNew/gibsonDigital.html ). Generally a 100 mbits ethernet link correspond  to 40 mbits pratically.

    Last but not least on that item, you will then most probably have to write your own driver for your OS which is far from a piece of cake. From that point of view, using a known USB class like audio could for example allow you to avoid that driver work.

    Again, I don't want to plug directly to a computer, or a thing like that, but more a separate box like the box of Gibson digital.

    If I want to plug directly into my computer, it's more reasonnable to have a ADAT link produced for example by the ADAT chip of Wavefront Semiconductor.

    Also the BGA stuff, again as Seppoman said, you should really forget about it.  It's absolutely no DIY packages, you have to make them solder by specialized companies who have the right tools to do it (and to check that the soldering has been done correctly). If you don't or if they are not equipped to check, that's extremely hard to know where a bug is coming from when something goes wrong.

    I study electronic and computer science in France, that mean we have BGA equipment ;)

    Last thing, if you make all that for ~100 euros (excl pickup and dev board), you're a champion  Wink

    MMhh, and for a little bit more, 100 to 200 €, too ?? ;)

    So to resume, finally I will maybe not try to make a midicontroller from scratch on AVR32 , or if I do, I will do all the treatment and audio processing on a separate chip, unless AVR32 is enough fast, and I will use only the MCU to control, for example, 8 pot and a touchscreen ;) .

    I'm here too to ask, if someones are ready to help me a lot in this project, developping together a really cool system :) ... Mmmmhh ??

  18. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    MIOS is NOT audio, it's only MIDI.

    Excuse me it was a lapse I would say that it's only MIDI :)

    that means with 8 channels in/2 channels out you have around one million samples per second. so the processor would have 210 cycles time per sample. With even the processed channels seperately transmitted, some cycles to input/output these, handle control surface etc, if you´re lucky you have 100 cycles to do something with the samples. So any processing/effects can´t be very sophisticated.

    Yep, it's true if I have separate ADC, not with a MUX 10:1 ADC.

    I´m still not sure what you mean by MIDI. Do you want a Guitar-to-MIDI interface? Midibox 16 or Seq have nothing to do with that. If you don´t want many knobs, for what do you need the Midibox at all? Its central purpose is to connect many knobs to it (and the MB SEQ needs dozens of knobs and buttons and two displays to controll it Huh

    Again: what MIDI? Notes or CCs? Transmit to what application? Why would you want to transmit all audio channels seperately if you´ve already done EQ/Volume etc. processing in the guitar? What protocol would you use to transmit audio? M-LAN? Do you have an application on the PC that can receive this

    I've wrotten somewhere this "control with a touchscreen and 8 pot the audio and midi (is a real big work)" so I don't want to have only 2 knob and pot, but I don't want to have 30 pot, I know the best is to have one-pot-per-function, but it's not realist, so I try to find the best compromise.

    Here I speak of transmit CC to control at distance parameters of FX board and FX software.

    I want to have separate audio channel because I can have more possibilities to morph the sound by this, imagine applying a reverb on E string, flanger on B, a fuzz on A, a metal overdrive on an other string, ...

    But as I said here, if I can make a conversion of audio to midi to transmit notes by midi, that will be the ultimate guitar :)

    That will be here perfect, but it begin to be very complicated. If I can do an onboard system to do an Audio-to-Midi conversion for each string ( with my piezo hexaphonic pikcup) like for the Roland VG system, it will be amazing possibilities in my guitar Cheesy.

    Most world class guitarists play really conventional guitars. If you´re a great guitarist, you can do magic on a Squire Tele with standard single coils. If you are not, 10 different expensive guitars/pickups and FX units won´t change it. 90% of a good guitar sound is made with your fingers and not by using the best 24/96 DSPs. I know a lot of guitarists who didn´t realize this and spent thousands of Euros on equipment while still playing mediocre shit.

    You're totally right, and I'm not a world class guitarist, but my mind is not in peace :) since I've had this idea, and I think more of the ability of controlling everything, to discover new sound, like a new instrument, than optimising guitar for a traditionnal play of guitar. I think a lot of the guitars and set up of Bellamy, for example his new guitar :

    M1D1_Manson.jpg

    MUSE_2L.jpg

    You can find other images here http://fr.forums.audiofanzine.com/apprendre/mailing_forums/index,idtopic,12091,idpost,,highlight,Gremlins_4u.html

    Have you seen what Lall posted?
    I'm not sure I understand what you want to transfer over the air. I assume that you want to transfer the MIDI along with the audio otherwise I don't see the need of digitizing all your audio channels. If indeed, you want to transfer audio in a wireless manner, pay attention to the fact that a single channel of 24bits/96kHz audio will require ~2.2Mbps of bandwidth and I'm only counting pure raw data needs here. With 10 channels, you come at ~22Mbps. That's kind of enormous, even current WiFi stuff may have issues to sustain such a throughput rate.

    I've seen what Lall posted, but I've said, I don't know where, that it's multiplexed data, not simultaneous data ... And if I can't do that by wireless, I will transmit by Ethernet ...

  19. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Yeaaaah it's interesting !!

    So I explain more precisely my project :

    I want a guitar with a total versatility of sound and with midi capabilities. That mean that I want to have a lot of pickups ( I think of an EMG 89; Dimarzio Tonzone ; Benedetti Rock ; and a piezo hexaphonic pickup) . I want to control for each pickup the volume and the tone, and maybe have the possibility to have a phase inverser and a low or high-pass filter for each pickup. But I don't want to have 20 pushpush or 30 normal pot + 30 knob on my guitar, it has to be simple to control !

    For example that is not good for me :

    IMG_0853.jpg

    So I want to digitize the sound. For that, I need good ADC, for example the 4 stereo ( so 8 mono) 24bit/96 khz multiplex ADC from TI. And I need a good processor to support the 2,2 mbps by input ... I think so of the AVR32 which have a 150mhz/210mips and several io :). The price for the developpment board ( 500$) is the maximum for me, the DSP from TI or AD is min 2000 $ with specialized IDE...

    Moreover, I want to have the capability to control the midi, without having 16 more pot and knob on my guitar.

    I had thinked so of the Midibox16E (or why not have a sampler/sequencer on my guitar ;), with a MB SEQ ;))

    And finally, I want to transmit all the channel and the midi separatly , or with an ethernet cable with PoE for the power supply of each chip, or by wireless but I've not found how load the battery without too big IC.

    So my second big problem is the battery. And less chip is less power consumption ... So if I could use the AVR32 for the audio AND the midi AND the modulation for the wireless transmission, it will be groovy :D

    P.S. Even if there´s no real advantage in porting MIOS to AVR, I still don´t know why people in this thread are claiming that it is less suitable for MIDI stuff. Has any of you made real experience with AVRs that leads you to this conclusion? For the last year I´ve been working on a quite powerful AVR-based project which also has MIDI capabilites, and I haven´t come over any problems that would be grounds for such a claim.

    P.P.S. Word from the master Wink http://www.midibox.org/forum/index.php?topic=6446.msg40118#msg40118

    - the "old" AVRs are cool. I like them better than the PICs. It would surely be possible to do something MIOS-like with them. But they are not that much faster or better than the PICs. So why bother?

    If we read the "Word from the Master Wink":D we see that he think about the ATMEGA644 which is old, but a uC like the ATMEGA128 or ATMEGA256 is really more powerful than a PIC18f52. It's a big changement,sure, because even if it's based on MIPS architecture, an ATMEL have around 80 instructions basicly :), but it's a good changement :)

    And if you want absolutely a microchip product, the PIC24f is a 16 bit architecture too :).

    Honestly, I don´t think you have any idea how much knowledge, work and money would be necessary to build something like the thing you´re dreaming of. Even if you know what you´re doing it would take years of work and cost way more than a PC with good audio hardware

    Honestly, I think I have :D ... I think it will take around 1 year of developpment, and without the price of pickup and developpment board, around 100 €.

    - the AVR32 is a new series. A powerful processor, but it comes only in BGA package which can´t be soldered by hand and you need multilayer boards to connect all pins... the only currently available way to use it is the evaluation board from Atmel which is around 500$
    You can find it http://www.digikey.com/scripts/DkSearch/dksus.dll?Criteria?Ref=8324&Site=US&Cat=33424297 . Sure it's expensive, but an AVR32 is like an ARM and a little DSP in one chip !!

    MIOS has nothing to do with audio. It is purely MIDI. If you want to do hi res multichannel audio, you´ll have to develop a completely new system, in which the MIDI and interface stuff MIOS is capable of will be your smallest problem.

    Yep, I know than MIOS do only audio, my question is that if I can have MIOS in my AVR32 and if you think it is realisable in a guitar :)

    There is no DIY solution for wirless midi transmission to my knowledge up to now, because of various problems of possible signal loss. There is however a device from M-Audio that might interest you 139,- EUR.

    I guess this task alone would cost about half a year development time at least (!) to get useable results.

    http://de.m-audio.com/products/de_de/MidAir-main.html

    We are not forced to have a specialized wireless transmitter for midi, I want to transmit all kind of data, the audio AND the midi if I can, and here, as it's digital 0 and 1 which is transmit and not analog data, I have just to build the adaptater for the recepter so the recepter can understand the modulation of data that I use in the transmitter and rock'n rooooll :)

    So, I guess with "DSP" you mean you want to do audiosampling, then frequency detection and then Midi-Conversion? Is that right?

    That will be here perfect, but it begin to be very complicated :D. If I can do an onboard system to do an Audio-to-Midi conversion for each string ( with my piezo hexaphonic pikcup) like for the Roland VG system, it will be amazing possibilities in my guitar :D.

    But converting 10 input in 24 bit 96 khz, treat them, and transmit them, is a big work, control with a touchscreen and 8 pot the audio and midi is a real big work, so I don't know if I will have this on my todo list :D

  20. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Hello

    Thank you for your quick answer :)

    I have mentionned the DSP because since my last reply in the other forum, I have had other ideas, like controlling by a touchscreen a lot of parameters, like here in more small :) : http://hci.uniroma1.it/multimedialab/modules.php?name=Progetti&op=view&progetto=TouchBox&pulsante_locale=Overview

    With this and 8 pot and knob, it can rock ! :)

    And I need power to treat 10 input in 24bit/96khz.

    I think a lot of the AVR32 because it's a good small DSP and big uC, and the developpment board is not expensive when you know that the developpment board of DSP from TI is 10x more expensive.

    Concerning the ADC, I have done on paper the Nyquist and Shannon theorem applied to my problem, and effectively I must have better ADC. I think a lot of a multichannel audio ADC like this http://www.asahi-kasei.co.jp/akm/en/product/ak5365/ak5365_f01e.pdf or this http://focus.ti.com/docs/prod/folders/print/pcm4204.html, I need 10 input so I can use this.

    Concerning the power, I've a lot thinked about this, and I've not found a solution.

    All the guitarist I know would have a wireless system directly integrated, so I can't use for example PowerOverEthernet with an Ethernet cable to transmit all the signals. I need so battery. I've thinked of a laptop battery but it's not very easy to iimplement.

    I would have digital switching but I ve seen the link you have given, it s interessant.

    For the wireless transmission, I think to use a specialized chip to do this, or if I can find anyone who have do this with the AVR32, I will use the AVR32 ...

    Anyone else have developped on AVR the midibox64 ?? I would do on this chip and not on a lot of chip because I would have more wood than electronic in my guitar ;) so if I can use a chip to do a lot of things it's better, and better too for the powersupply ...

    PS : I've seen you use the AL3101/2 DSP from wavefront, what do you think about this DSP ?? Your miss parker is really interessant, I would be interessed to help to implement MIDI :)

  21. A midicontroller in my guitar !!!

    in MIDIbox HUIs

    Posted

    Hello !! I'm french so excuse me for the mistakes :)

    I've a big project concerning a customization of my guitar, I want to have a total versatility of sound, and controlling all my effect and vsti  with knob and pot from my guitar. I think of a Midibox64E implemented in my guitar :)

    All the subject concerning the pickup & cie is explained here : http://projectguitar.ibforums.com/index.php?showtopic=28305

    I would know what do you think about this idea, and if it is realisable, and too if I can use a dsPIC or an AVR32 instead of a PIC for the MIOS ...

    If you have some good ideas, help me please ;)

    "Merci"

    Yann

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