Raspberry Pi Forums

omenie

... I should say, this response is equally applicable to physical pipe organs as it is to virtual ones, even though it’s phrased in terms of virtual. The ‘synthesis engine’ on a real pipe organ just being the embedded computer that manages the big bitmap of what pipes are speaking or not at any give...

omenie

It’s pretty brainless to get this right to be honest, and is actually way harder to get wrong than to get right. Since the synthesis engine has to maintain the current set of depressed notes in order to synthesise at all, doing the right thing - in terms of the engine internally commanding ‘pipes’ t...

omenie

MIDI is good for most instruments, but can struggle with 'real' organs. The problem is that it does not send 'keyboard note down', 'keyboard note up' messages, but sends 'note on', 'note off'. Since having multiple stops out means that each press of a keyboard note generates multiple sounds, the MI...

omenie

Just saw this thread, after I posted one of my own a couple of days back. If you are interested in a port of my St Just in Roseland Organ app (iPhone, iPad, iPod Touch, uses wavetables not samples, should run great on a Pi 2 or up, a breeze on 3 or 4) let me know on raspberrypisynthesizer at gmail d...

omenie

I’m hearing a pretty deafening ‘NO’ ...

omenie

Hi folks If anyone is interested in a port of the St Just in Roseland Virtual Pipe Organ to the Pi (currently on iPhone / iPad) please give me feedback on raspberrypisynthesizer at gmail dot com - keen to do it, but if nobody actually cares, why bother? And please indicate if you would be interested...

omenie

It's not the most straightforward programming exercise, effectively boiling down to the work I did to support Minecraft over RealVNC last year - you need to collapse / composite the frame buffers into a single buffer then pass that into an encoder. For RealVNC that was a frame by frame JPG encoder b...

omenie

8 out 6 in is overkill for my needs, but 8 in 2 out would be AWESOME for tracking and production. Fancy another KickStarter?!

omenie

TBH anything over USB - it's all dependent on how the Linux filesystem is implemented deep down in its bones, and I know nowt about that. The critical thing is, if the number of active pages/sectors/whatever that need to be kept open in RAM exceeds an internal implementation-defined limit you'll see...

omenie

Re. USB drive - not so sure about that as an improvement. The nastiness with a DAW is you have a very large number of widely-scattered read points and write points to the filing system, in my current case 8 or 16 write points and up to 96 read points (tracks), so depending on how the file system is ...

omenie

I have a DAW engine Ive written that can sustain well over 72 tracks of playback. RAM isn't the limit here, SD read/write speed is. So their quoted 32 is a bit lower than expected but still enough for somebody to make the equivalent of Sgt Pepper, Who's Next or Led Zep IV!! Very excited about this. ...

omenie

Announcement at NAMM 2017 that Tracktion will be creating interface hardware and making their DAW available on Pi 3 - http://www.sonicstate.com/news/2017/01/ ... udio-apps/

omenie

Or even 'disable the HDMI display' - extreme finger blindness today

omenie

When I run using the Pi display (the official 7" thing) I see significantly worse performance than when using just HDMI. The only conclusion I can draw is that the HDMI subsystem is still burning memory cycles fetching and compositing the framebuffer - can anyone confirm or deny this, and indicate i...

omenie

The new 'Minecraft over VNC' build is IMMENSE!

omenie

Working, and happy to connect the additional cables between Model B+ and display board - I don't like micro USB for power so am more than happy to remove one of them. The biggest problem was PSU - I had an Apple 10W charger which seems to only be 5.0v unloaded, using a newer 12W 5.2v plus fat wires ...

omenie

Thanks for this. At least I now know this isn't the problem - I just read on another forum post that undervolt warnings cause the Pi to drop out of turbo mode, which is what's killing me. I need to improve my power supply situation and get 5v into the Pi over all those GPIO pins rather than the micr...

omenie

Hi all I am seeing a dramatic performance hit when using the Pi display. Same SD card, plug into a Pi Zero at HDMI 1080p, runs fine. Plug into a B+ with a Pi display, big slug. I am assuming is due to the HDMI continuing to read framebuffers - any idea how I can turn this off to be sure? cheers Phil

omenie

Hi all - this keeps happening after running my synths for about 2 days - not the same Oops every time, but it does Oops. I have no clue how to work out what is happening, if anyone can advise in any way it would be appreciated. Message from [email protected] at Jan 3 15:55:08 ... kernel:[77287.070...

omenie

It's neither open-sourced nor ready to release. I'd love to take a look at what you've done but I fear I won't ever have the time!! But if you are getting 20+ notes of polyphony out of a Pi 1 you are getting something right, it is challenging to squeeze that level of performance out of these things....

omenie

Rolling your own is absolutely the only way. The last time I measured I got some 50 notes of polyphony, 2 layers per note (e.g piano plus strings) on a Pi model A with my sample replay engine.

omenie

That FM demo on SoundCloud sounds bloody brilliant!!! Here's a couple of recent PIANA demos as it gets closer to being shippable. 'Closer' is a relative term, obviously ... First a Human League tune with giant handclaps : https://soundcloud.com/pisynth/being-boiled-on-a-raspberry-pi-first-test Secon...

omenie

These 2 lines of assembly code are a life saver and should be shouted from the rooftops. I've just gone from, at 950MHz, my test sequence rendering at 39k samples/sec and hence failing to meet ALSA deadlines up to 120k samples/sec as I hit 'stop' and it all just becomes reverb tails. Huge, huge diff...

omenie

are there any interactions with "try to make it go fast" settings I have got turned on, like -mfpu=vfp -mfloat-abi=hard -ffast-math -ftree-vectorize? I will try dropping this in and turn off all my 'manually catch denormals' to see what happens. And thanks in advance for the snippet.

omenie

Ijust found this post related to a problem I'm having. I'm apparently gettign denormals generated (my code does a lot of IIRs and these things will happen) and when it happens performance plummets - can anyone advise on how to get g++ to put the device into a mode where denormals are treated as zero...

Search found 94 matches

Re: Raspberry PIpe Organ

Re: Raspberry PIpe Organ

Re: Raspberry PIpe Organ

Re: Raspberry PIpe Organ

Re: Church Organ - any interest?

Church Organ - any interest?

Re: Screen recording on Pi

Re: Tracktion - professional DAW and interface hardware

Re: Tracktion - professional DAW and interface hardware

Re: Tracktion - professional DAW and interface hardware

Re: Tracktion - professional DAW and interface hardware

Tracktion - professional DAW and interface hardware

Re: Pi Display - can I completely display the HDMI?

Pi Display - can I completely display the HDMI?

Re: VNC instructions (Pi remote desktop)

Re: Disable video refresh for HDMI / composite?

Re: Disable video refresh for HDMI / composite?

Disable video refresh for HDMI / composite?

Kernel Oops - anyone able to advise me?

Re: Raspberry Pi based Synthesizer

Re: Raspberry Pi based Synthesizer

Re: Using the Pi to build a hardware synthesizer

Re: VFP issues with denormal numbers

Re: VFP issues with denormal numbers

Re: VFP issues with denormal numbers