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eptheca

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Posts posted by eptheca

  1. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Just now, Antichambre said:

    Hi Hal,

    Hope you're fine...

    Midiphy is more than a front panel, it's a new MB dedicated webshop!

    Cheers
    Bruno
     

    Hi Bruno, I'm OK thanks, and you?

    OK, yes I see.

    But what can we call this version of the MB SEQ V4+

    It's just to find a name so we can discuss and troubleshoot the different versions of the MB SEQ V4+

    I did not mean to disrespect the webshop :)

     

     

  2. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    This is really great work guys. I am always impressed by all the talent, knowledge and creativity in this community.

    Could I suggest that we call this just the Midiphy, so we can differentiate between the Wilba and the Midiphy MB SEQ V4+

    If I understand correctly the Midiphy is a new frontpanel. The MB SEQ V4+ relates to the STM32F4 Core and can be used with the Wilba frontpanel, at least that is what I am doing now.

    This is no criticism, I am just pointing out a possible area for misunderstanding in the future.

     

    My buttons are staring to fail as well, and playing live this weekend it was a bit annoying. 

    I have a few questions:

    - Can I have my @ilmenator  TPD and BLM 16x4 connected to my V4+ with the Midiphy frontpanel?

    - Can I use my STM32F4 Core, 2x MIDI I/O, 2xQuad IIC and AOUT_NG with the Midiphy frontpanel?

    - Will there be a DWG/DXF/FPD cad file available to design and order custom frontpanels?

     

    Cheers, Hal

  6. Record replacing notes...what did I do?

    in MIDIbox SEQ

    Posted

    On 3.3.2018 at 9:51 PM, TK. said:

    Probably I found the problem, please try this version:
    -> http://www.ucapps.de/mios32/midibox_seq_v4_095_pre10.zip

    Whenever the "step edit" feature was used in EDIT page, the played notes remained in the queue and then overwrote notes during live recording.

    Now they should be properly erased.

    If the issue happens again, open MIOS Studio and enter "dbg_record" in the MIOS Terminal.
    This should give you a list of played notes - and maybe help to understand the problem (and to give me more information :)

    However, probably you won't need this debug option anymore if the bugfix is working as intended.

    Best Regards, Thorsten.

    I think this will fix my problem from here  http://midibox.org/forums/topic/20578-jam-mode-record-cc-filter-sweeps/

    Is it possible to get this fix in an uncompiled version, or is it only in this precompiled version in the link?

    Cheers, Hal

  8. Low sound level sammichFM

    in MIDIbox FM

    Posted

    Thanks for the suggestion.

    I removed the 12 resistors for the voltage dividers, and replaced R52,53,54,55 with jumpers.

    Now it's louder, same level as my MBFM with your mod.

    I do notice some distortion with all 4 operators on full volume though, so nILS design make sense and is probably "cleaner".

    I guess I just got used to the sound and level of my MBFM. At least my patches now sound the same :)

    Is this maybe why the original design has amplification in two stages with the 3 TL074, to prevent the clipping and still get a high output level? 

     

     

     

    sammichFM_mod.JPG

  9. MidiBox Cool Diy Device But Only For C-Code Experts

    in MIDIbox HUIs

    Posted

    1 hour ago, zener said:

    returning a bit on the topic , 

    want to recall the fact that the very big part of musician that uses electronic devices/instruments for make music ,

    want spend the available time to make music 

    it sounds to me that you are into making electronic music, not electronics

    this place is mostly for those that want to do both

    I don't think anybody here do this to save time or money. For many of us MIDIbox is a hobby / passion / obsession ;)

    If you need a MIDI controller, Novation makes one for every need

    If you want a similar sequencer, Sequentix Cirklon seems like "the second best in class"  

  10. Low sound level sammichFM

    in MIDIbox FM

    Posted

    In this post by @Sauraen, @nILS explains the op-amp circuit schematic on the sammichFM 

    He used a voltage divider to lower the signal to prevent clipping. I don't have that in the 5V mod on the MBFM.

    I haven't noticed any clipping, but I haven't really listen for it either. Maybe it's there, and I just haven't heard it.

    Other people also comment on the sammichFM being quiet, but it sounds like it is a conscious decision.

     

    Has anybody compared the sammichFM and the original MBFM (TL074  +/- 12V op-amps)? Output level and clipping?

    Should I add a voltage divider to the 5V mod?

    How can I measure the potential clipping? 

    Can the sammichFM be modified to sound louder? Change resistor values in the voltage divider, or remove it? Change op-amp?

    What are the pros and cons of the two op-amps? Differences? 

    MPC6400 op-amp http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf

    OPA4348 http://www.ti.com/lit/ds/symlink/opa2348.pdf

     

    Cheers, Hal 

     

  11. Switch between sessions

    in MIDIbox SEQ

    Posted

    SEQ V4 (STM32F4) 092

    I have been trying out different ways to play live, after getting some ideas here on the forum.

    For the way I have stuff set up, it works best for me to have each "song" as a session.

    I have tested for a while now with different tempos and songs, and it seems to me that I can switch between sessions with the sequencer running without any delay.

    It changes sessions instantly when I press the new one, and I can jump back and forth between sessions and it stays in sync.

    Is it designed to be able to do this?

    Are there any limitations in what the session can contain of info?

    Are there any problems with doing it like this, like memory or crash?

    Cheers, Hal

  12. Low sound level sammichFM

    in MIDIbox FM

    Posted · Edited by eptheca
    error

    I have a MBFM and a sammichFM.

    I have built the MBFM with a OPL3 module that I have modified with a 5V option I have described here http://wiki.midibox.org/doku.php?id=opl3_module_modified

    It uses a MCP6400 op-amp http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf

    Lately I have been using my sammichFM, and that sounds much quieter. The sammichFM uses these op-amps OPA4348 http://www.ti.com/lit/ds/symlink/opa2348.pdf

    Attached is an image of a recording with the MBFM on the top and the sammichFM on the bottom. Same note, velocity and patch.

     

    Can anyone see a reason why the sammichFM is so much quieter? Are the op-amps that different?

    Cheers Hal

    fm.JPG

  13. How do You play?

    in MIDIbox SEQ

    Posted

    @Hawkeye Thanks :)

    It's actually 8 tiny 7-segment display modules. It's controlled by an MAX 7221 and an Arduino (ssshh, don't tell anyone else on the forum) the keypad matrix is scanned by the same "microcontroller". It's not documented anywhere no. It has a MIDI In circuit, and the code just pass it on to the WAV trigger. The key presses send Note On and Program Changes. 

    • Like 1

  16. How do You play?

    in MIDIbox SEQ

    Posted

    Thanks guys for sharing your techniques. I guess there is many ways to play the MB SEQ :)

    I wasn't aware or the Pattern Remix Feature, and after a quick glance, it looks like something that could work for me.

    Using Phrase mode the way you suggest also looks like it could work. I guess I just need to try it out and work out a way.

    @u-link I am just cooking some straight 4TTF Techno-ish stuff, nothing fancy ;)

    The Tsunami sounds great. I have made a sample player module with his former WAV Trigger. It only has a stereo channel, but I pan the samples and use it as a 2x mono sample player.

    Looks like this: 

     

    I've reused the keypad and display from an old calculator (like the one to the right), added a micro-controller and a MIDI circuit and the WAV trigger.

     

    But back to the topic, others on the forum please share your techniques as well

    • Like 2

  17. How do You play?

    in MIDIbox SEQ

    Posted

    Hi,

    Could you please share how You use your MB SEQ to play your "songs"

    I have had my sequencer for a little while, but I have only used it one way that seemed easy and intuitive at the time I started using it.

    I treat each Session as a "song" and have each Track mapped the same way in all Sessions. Each Track is dedicated to a specific synth-, drum- or sound module.

    This setup works great for playing one "song" at a time, and for creating and recording one "song", but I suspect it's not the best way to play a live set.

     

    I have tried to understand how Patterns, Songs and Phrase works, but I don't think I get it totally, or how I would use it.

    I guess what I was hoping for was something like a Scene in Ableton Live Clip View, where you can jump to the next line/scene of MIDI sequences with the push of a button, and it is synced.

    Is it possible to treat a Session like a scene, and jump to a new Session synced to the beat and measure?

     

    How do you guys play a live set with several "songs" ?

    Cheers Hal

     

  18. MidiBox Cool Diy Device But Only For C-Code Experts

    in MIDIbox HUIs

    Posted

    Hi,

    Since I joined this community in 2010 I have built and still use:

    MB SID V2 Stereo (x3)

    MB NG

    MB 64

    MB CV V2

    MB FM

    MB GM5 (x3)

    MB TIA

    MB sammichSID (x2)

    MB sammichFM

    MB SEQ V4

    I have never written, nor can I write, a line in Assembly or C

    I have only edited files in a text editor, compiled and uploaded.

    Knowing how to code would probably give me more options, but is definitely not necessary to build and enjoy these devices.

    Yes there is a lot of information, but it's all there, and a big group of friendly and helpful people on the forum directs, encourages and debugs with you.

    Start with something easy / manageable and go from there.

    Cheers, Hal 

  19. JAM mode record CC "filter sweeps"

    in MIDIbox SEQ

    Posted

    Actually, I can't get it to work, or maybe I don't understand how it works.

    I want to record different MIDI CC values to 8 different layers in a CC track.

    When I initialize the track, all the steps are set to value 0.

    I use the Jam Live Mode, and when I run the sequencer, all the steps go "----"

    I twist the knob and send CC values from my controller, and the values are forwarded to the synth, but they are over written with "----"

    Pressing clear, clears the whole track.

    Also I can't work out the All Button.

    From what I understand it is 3 functions, All values, Relative values and Value ramp.

    It is not clear to how they work, because pressing and holding and just pressing does different things at different times.

     

    Cheers, Hal

     

  22. MIDIbox SEQ new frontpanel idea

    in MIDIbox SEQ

    Posted

    Just now, AM said:

    I want to point out that the mentioned heights of the new modular PCB seems to be 124 mm by now. For all those considering Eurorack it would mean it´s doable. The 3U measures as 133,33 mm so there is plenty of space left.

    Eurorack panels are 128,5 and depending on the type of rails the recommended PCB height is about 107mm.

    I don't think the 124mm PCBs will fit between the rails.

    If you mean 19" 3U rack panels, they are 132,5mm and it will fit, like the Wilba SEQ V4 CS PCB does today. 

  24. MIDIbox SEQ V4 Release + Feedback

    in MIDIbox SEQ

    Posted

    I have a BLM 16x4 connected to my SEQ V4.

    Would it be possible that on Drum tracks each drum instrument had its own track showing and that it was possible to jump to the next 4+4+4 instruments with the up&down buttons for example. I think this would be great for editing the drums.

    If I understand it correctly, this is possible with the BLM 16x16+X ?

    Cheers, Hal

     

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