KVR Audio

Teksonik · Post by **Teksonik** » Tue Feb 27, 2018 12:44 am

Scrubbing Monkeys wrote: As the MASTER of Synth1. I think its a matter of philosophy for Dr Bob to use the free version.

Sorry but the MASTER of Synth 1 is Annabelle (aka) Nolwenn........

http://ann.sounds.free.fr/

Anyway Master Bob can get the full version of Fathom for the price of a medium pizza. There is no philosophical reason not to...........

Frostline · Post by **Frostline** » Tue Feb 27, 2018 7:08 am

Possible bug,

Bottom track is a direct recording of the top track.
Project tempo 135 bpm.
Should all be 1/16 notes.
Sometimes Fathom decides to take a little nap for a few notes.

Issue discovered in Reaper 5.75, tested in a new Reaper project and confirmed in MuLAb 7.7.4 (more frequent occurrence of issue than Reaper) Windows x64 using Fathom Mono 2.7 MT build.
Only modulation was an ADSR on volume. Turned modulator down and manually increased volume (attempting to bypass modulator) but issue still occurs.
Seems to happen most often prior to a lower velocity note, but not 100%.

Reaper project file, the patch, the midi item, the wav and peaks file included in zip.
Wasn't sure what would be needed. Maybe someone can test the patch and midi item in another system.
https://1drv.ms/u/s!AuTU2-ocFX74hjstKk-1byHATSfu

Scrubbing Monkeys · Post by **Scrubbing Monkeys** » Tue Feb 27, 2018 11:25 am

Teksonik wrote:
Scrubbing Monkeys wrote: As the MASTER of Synth1. I think its a matter of philosophy for Dr Bob to use the free version.
Sorry but the MASTER of Synth 1 is Annabelle (aka) Nolwenn........

http://ann.sounds.free.fr/

Anyway Master Bob can get the full version of Fathom for the price of a medium pizza. There is no philosophical reason not to...........

Agreed Fathom is really a no brainer.

I say that about Dr Bob because in one of the Any Synth challenges, he chose Synth1 and the did a really cool old school Jazz tune. It was soooooo sweet.

I will check out Anna's site.

FathomSynth · Post by **FathomSynth** » Tue Feb 27, 2018 1:19 pm

Frostline, OK, Thanks for posting the info. I'll take a look at that.

I think we need a bug fix release coming up for all this stuff.

Please make sure your ADSR release time is less than the space between those 16nth notes and let me know if that helps.

Also, I think that could be caused by using the mono instead of poly version.
Granted it still should not miss notes.

Also, someone please remind Tj Shredder to provide complete steps for me to reproduce the aliasing problem,
any aliasing problems are top priority. The aliasing is not happening for me and I can't fix it unless I can reproduce it.

Tj Shredder · Post by **Tj Shredder** » Tue Feb 27, 2018 1:29 pm

FathomSynth wrote: Also, someone please remind Tj Shredder to provide complete steps for me to reproduce the aliasing problem,
any aliasing problems are top priority. The aliasing is not happening for me and I can't fix it unless I can reproduce it.

I'll make video...

FathomSynth · Post by **FathomSynth** » Tue Feb 27, 2018 1:39 pm

OK, Cool, that would be great.

What is your OS and host DAW?

Tj Shredder · Post by **Tj Shredder** » Tue Feb 27, 2018 1:43 pm

Its Sierra on a Mac Pro and either Bitwig or Mainstage or Max/MSP or all of them...

Teksonik · Post by **Teksonik** » Tue Feb 27, 2018 2:18 pm

Frostline wrote:Possible bug,

Can you do a test for me please since you have Reaper (if you have a midi keyboard) ? Load Fathom and use Reaper's "Record: Output Stereo" (instead of recording midi). Play some notes for 8 bars and then play back the resulting audio file. Does something odd happen after 4 bars or so ?

I tried it here and after 4 bars the volume of Fathom increases dramatically. I've used Record Output many times before with other synths and never had this happen before.

I want to rule out possible user error or a system specific issue before reporting it as a Fathom bug. So if anyone could run the test I'd appreciate it.

FathomSynth · Post by **FathomSynth** » Tue Feb 27, 2018 2:36 pm

TJ, Yes a video would be awesome, even better with sound.

Aliasing bugs are the highest priority so I'd like to have this fixed in the next release.

The Fathom code has the power to pull back partials per note frequency,
and also control the buffer size and interpolation,
so this should be easy to fix once I see it happen.

Frostline · Post by **Frostline** » Tue Feb 27, 2018 4:29 pm

Teksonik wrote:
Can you do a test for me please since you have Reaper

Patch 1973 Analog Saw Filter, using Fathom poly 2.7.1 windows 7 MT build

The bit in the middle is where I dropped 2 octaves on my keyboard to get a fuller range of notes, the low notes produce a slightly smaller waveform but when I move back up the keyboard the notes at the end don't appear to me noticeably louder.

Let me know if there is a specific patch you would like me to check.

Frostline · Post by **Frostline** » Tue Feb 27, 2018 4:39 pm

FathomSynth wrote: Please make sure your ADSR release time is less than the space between those 16nth notes and let me know if that helps.

Yes the release time is well within the space needed. Notice in the pic I provided that most of the notes are quite well separated. Had the release been too long they would all touch wouldn't they?

FathomSynth wrote: Also, I think that could be caused by using the mono instead of poly version.
Granted it still should not miss notes.

No.
Here is a image using the same patch and same midi item but using Fathom poly 2.7.1 Windows 7 MT build. Please note the Windows 10 specific alternate build would not validate on my system though I am running Windows 10. Both were fresh downloads done this morning.

Teksonik · Post by **Teksonik** » Tue Feb 27, 2018 4:41 pm

Frostline wrote: Let me know if there is a specific patch you would like me to check.

Thanks for testing. I don't remember which patch I was using. Perhaps the problem lies in the patch itself. Let me do some further testing to see if I can reproduce the issue again.

FathomSynth · Post by **FathomSynth** » Tue Feb 27, 2018 4:58 pm

Tj Shredder, Thanks.

Please make sure the video shows the spectrum or include a screen shot of the spectrum also,
also make sure it shows everything starting with adding the oscillator,
And please include the exact steps to reproduce.

Also try a single mouse click on the partials dial instead of using the mouse wheel
and see if the aliasing suddenly drops.

Frostline · Post by **Frostline** » Tue Feb 27, 2018 5:00 pm

Also, to confirm the Windows 10 specific alternate build also fails in MuLAB 7.7.4 in Windows 10 x64
so it is not just a Reaper issue.

MuLAB loaded the alternate MT mono x64 version fine.

FathomSynth · Post by **FathomSynth** » Tue Feb 27, 2018 5:21 pm

Frostline, thanks for posting that.

It means that you are missing a DLL needed by the MD dynamic link build.
Which means you do not have the Visual Studio Redistributable installed on your system.
I did not think this was necessary on Windows 10, but apparently it is.
I will update the manual to explain this.

Please go here, download it, and install it:
https://www.microsoft.com/en-us/downloa ... x?id=30679

If it fails and says it's already installed that means you don't need it (and there's some other problem).

Let me know if that fixes it so I can update the manual for everyone else.

Also for the missing notes problem and the volume increasing problem,
does changing the polyphony to either 32 or 1 impact the problems?

The volume increase should go away if polyphony is 1, that would help me fix it.
The missing notes I'm not sure yet, will need to test it.

Fathom Synth Development Thread