Hawkeye

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About Hawkeye

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    MIDIbox Guru
  • Birthday 01/15/1976

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  • Website URL http://www.youtube.com/user/Maelstroem3

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  • Gender Male
  • Location Germany, Munich

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  1. just a very short note - if you want to create an oscilloscope output (i.e a waveform display) with many set (and cleared) pixels per frame, it might make sense to just send a whole framebuffer update for every frame (buffer pixels in ram, then send full screen) instead of individual pixels - you can have a look at playground/hawkeye/mbprogramma to see how it works there (implemented a .pcx bitmap loader for label OLEDs) - it is quite simple and should be fast enough if you only want to update a single display. But you need to manipulate single pixel data in a way Bruno wrote, i.e. with bitwise or, and, xor operators because of the packed memory format... The advantage of this is, that a screen only takes (128*64)/8 bytes of ram. Have fun and good luck! Peter
  2. LoopA v2 prototype

    very cool! :) @norbim1 yes, it is based on the new waveshare core, but Andy created a completely new carrier core board for it, especially for the LoopA form factor, including onboard 4x MIDI OUT (OUT4 doubling up as a future BLM extension connector :)) and 2X MIDI IN for your favourite keyboard and sync downlink from a MBSEQ :)... As of today, the sources compatible with the new PCBs/UI are also checked in to the MIDIbox mios32 subversion repository, so if you want to test-compile it, you can check it out @ trunk/apps/sequencers/LoopA :) The code and functionality will be extended after availability, but it works already with support for six "scenes" with each six polynote "clips", that can be dynamically requantized while it is running - the display also shifts the notes around graphically, so you see what is happening - hoping to be able to do a demo video of the new version soon! Many greets, Peter
  3. LoopA v2 prototype

    Ongoing BOM validation - looking good! The picture of my test build below is still missing the encoders and a few more Matias switches/keycaps. Fantastic job, Andy! The small form factor in conjunction with the superflux RGB LEDs and Matias switches with additional encoders definitely makes all the difference to my first hacked perfboard build. It was not too demanding to build (can be done in an evening if you push it), but it has a high packaging density for a DIY project and it requires a bit of patience with board interconnections (three boards in total). That does not classify it as a beginner project - but hey, as you can buy everything else, a challenge from time to time is exactly the right thing! :) We will document it properly, so that everyone confident with wide-pitch SMT soldering (1206) can build it, too! Availability target: late springtime, make that midsummer, the SEQv4+ has priority. Many greets, Peter
  4. SD card polyphonic sample player

    @Elektruck yes, with a FAT32 formatted SD-card you should be fine, there should be no root directory file limits using that filesystem, only the older FAT12/FAT16 filesystems impose such a limit. Many greets, Peter
  5. SD card polyphonic sample player

    Hi, it might be outdated information, but back from old DOS days i remember there was a limit of how many files might be allowed in the root directory of a FAT filesystem - and it was around the 8-bit barrier, if i remember correctly :). This limit did not apply to subdirectories - so the underlying filesystem might be the reason? There might be differences between FAT16 and FAT32 - and TK's recommendation should always work - use subdirectories! :) Many greets, Peter
  6. Seq V4 for the visually impaired

    Hi, maybe you could also be interested in using a MIDI looper with primarily haptic interaction. This approach would allow you to make loop-based music completely without a display. Andy and I are currently developing such a looper, based on TK.'s MBSEQ sequencer engine. It has a display, but it might be reconfigured to offer these primarily haptic functions: * turn an encoder to change the currently active track (on which you are recording) * use an encoder to change the pattern length of the currently active track (from a limited number of presets) * use a footswitch to start/stop playback and recording * use a footswitch to "punch out" notes during rerecording of a loop * use a switch (can be marked with "braille" markings) to clear currently active track -> this would allow for a basic, purely haptic recording setup * use switches (can be marked with "braille" markings) to choose currently muted/unmuted tracks * use an encoder to change the current scene (multiple clips are played in parallel tracks in a scene, switching the scene will "load" new clips into the tracks. A track is associated with a MIDI instrument) * use an encoder to change BPM -> this would allow for live sequencing, also without a display Such a setup might be used to drive several MIDI hardware synths using a MIDI keyboard. Many greetings, Peter  
  7. MIDI_CORE_LPC17 PCB?

    @WingMaPlease stop flooding the forums - you can find everything documented well, as all the others told you already. And yes, it always makes sense to use the current core and not an old one, so STM32F4 is the way to go...
  8. LoopA v2 prototype

    Awesome, and i mean REALLY awesome PCBs, man! Thanks! :) PS: as you can see on the second photo, there is an URL (nothing to be seen behind it yet!) - with TK.'s permission and also with very friendly coordination and cooperation from John/modularaddict.com, we will be opening a little eurozone based MIDIbox store at some point in time, where you can get these goodies, including the new MBSEQv4+ boards :). US-based customers can (at a little later time) obtain the PCBs from John's shop. Many greets, Peter
  9. [S] Midibox, Ambika and assorted

    Hi Shuriken, uh-oh, hopefully the move is not too stressful! I might be interested in the TM3030 - does it work and do you have some some transistors and the schems (came with the purchase of the board) for it? If that is a given, i'll gladly take it - just don't have the time to commit to any builds at the moment, but would enjoy a midi controlled 303-clone :). Thanks and many greets, Peter
  10. Can you check the 5V rail, when you power it externally? 100mA is a too low current - a reason might simply be, that the PSU is damaged and not capable of delivering 2 Amps. That could cause a voltage drop to probably way below 4.5V and a low current reading. It is strange, that it does not work with an alternative external power source, though, but please measure the 5V rail voltage and report back. Many greets, Peter
  11. Beginner question: How to get started with OPL3?

    Welcome to MIDIbox! :-) A quick way surely would be to build or buy an oldschool PC and install some DOS software on it. Some musicians are pushing the OPL3 to its limits using that setup, e.g. "Diode Milliampere": To simplify things, and have a portable music player, you could just buy e.g. an old Toshiba Libretto laptop :-). But, as you are an electrical engineering student and on MIDIbox, this would be our preferred project: http://ucapps.de/midibox_fm.html It is well documented, but you need a bipolar power supply and some time. If you build one, you will have better MIDI connectivity and "playability" than from a DOS machine. Good luck and have fun! Many greets, Peter
  12. PCBs for sale

    Here is a walkthrough on the ELO boards by Andy: https://www.youtube.com/watch?v=iKZ_7VVqbFo The LEDs are RGB with an integrated controller (WS2812), fully mixable by MBNG, you can achieve many different colors. Many greets, Peter
  13. send pm via smartphone display area problem

    well, that is most likely a problem with the forum software, which we did not write - it also gave us the headaches about the vanished old gallery pictures...  The problem you describe might be possibly fixed (no guarantee!), when the forum software is updated to a new version at some point in time - there are plans to do this, also you can accelerate the process by sending hosting donations to TK., e.g. via PayPal, any amount will help, thanks! :-) Many greets, Peter
  14. search 4 OLED LCD

    4-wire spi: http://ucapps.de/mbhp/mbhp_lcd_ssd1306_multiple_mios32.pdf needs said 7 pins to connect - in the ebay listing there are pictures with 7 pins and what looks like spi pinout, it might work - i'd recommend to order one or two displays to test first, before buying a whole batch - looks like a fantastic price, btw! :-) Many greets, Peter