Mininova starts crackling during use (not connection issues)

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scrattyrat
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Joined: 04/26/2013 - 20:09
Mininova starts crackling during use (not connection issues)

My mininova starts crackling during use. I have the latest firmware etc. It starts usually within minutes of beginning to use it, at which point rebooting ableton fixes the issue, but it starts again after a few minutes. This would indicate that it is not a problem with wiring. Has anyone esle encountered this?

Mininova with latest formware with audio out connected to soundcard running audio through ableton

Ableton Suite 8 v 8.4.1

NI Audio 8 DJ Soundcard

skijumptoes
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Last seen: 2 years 10 months ago
Joined: 03/26/2013 - 13:22

Hmmm, sounds like an Ableton issue to me?

Things i would do are:

1. When it crackles, record the audio from the mininova with nothing playing, then check the waveform to see if it has recorded the crackles (By eye).  This will let you know if the crackling is coming in to Ableton or not.

2. Try Increasing the audio buffer size in ableton, it could be that you're pushing your system too hard with a low buffer / too low latency settings, and after a while it's causing the crackles.

scrattyrat
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Joined: 04/26/2013 - 20:09

Hi thanks for the reply.

 

There is no crackling uness the keyboard is being played i just checked as you suggested, not sure that proves there is an issue with ableton though, only that crackling appears when a key is being played, which could still indicate a problem with the keyboard as well as something with ableton?

 

My buffer size is 824 currently, i will try increasing it and see if that helps at all. Hope so :-)

 

Thanks

scrattyrat
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Joined: 04/26/2013 - 20:09

Crackling still occurs after increasing the buffer size to 1348. There is no indication the CPU is struggling ia the ableton indicator. Wil try increasing it a bit more.

skijumptoes
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Joined: 03/26/2013 - 13:22

No, that's a huge buffer, you should be good for about 256 upwards on most modern systems in my experience.

As i said, you need to record the sound of the keyboard in, and then play it back and check if the crackles exist on the input signal.

So:- Just play some notes in on an audio track, and then play back the clip that you have recorded.

Once you hear a crackle move the play head/locator back over to where you heard it and see if you can get it to repeat at the same point each time.... do this several times to confirm if the crackle is being produced on playback, or is actually in that sound file that you've recorded.

If it can be repeated then you know the crackles are on the input, and therefore before ableton, if it crackles randomly when performing this test then you probably have either a driver/soundcard/ableton issue.

Do you know if you're monitoring the incoming audio through ableton? i.e. do you need to have the channel armed to hear the mininova playing?

 

Also, as your buffer seems so high, are you are running on the ASIO driver for your soundcard?  This is very important.

Also, is the DJ Soundcard plugged directly into your computer, i.e. so it is getting the power it requires?

lazzy_8
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Joined: 04/28/2013 - 23:48

I have a similar issue.  I found that if I disconnected the USB cable going into the mininova, the crackling stopped.  It wasn't an issue with Ableton being overloaded.  It seems that in my case the clock bpm keeps jumping up and down and this is what is causing the issue.  I'm not sure how to resolve the issue.  I emailed Novation support but they never got back to me.  Try to disconnect the usb cable and see if the static is still there.  Also record a track with External Instrument set up with your mininova and add the mininova fx vst and see if the clock source is jumping around.

skijumptoes
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Last seen: 2 years 10 months ago
Joined: 03/26/2013 - 13:22

Excellent point to make, it could be what scrattyrat is experiencing also!!

When you sync the tempo to your DAW it does jump around until it finds the right tempo, the latest firmware has improved that somewhat, but it's not rock solid.

The noise you are getting is USB noise, possibly caused by a ground loop between your hardware.

General rule of thumb with audio equipment is to make sure everything is plugged into the same power outlet (including your computer), it will minimise these issues.

lazzy_8
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Joined: 04/28/2013 - 23:48

OK, I have found that if, in Ableton's Preferences on "Midi Sync", I disable "Output Mininova" "Sync", then the crackling sound goes away.  I have my Mininova set to "Clock Source External" so now if I change the tempo in Ableton, the tempo doesn't change in the Mininova and the ARPs are not sync'ing with the beat in Ableton.  :(  At least there is no crackling.

skijumptoes
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Joined: 03/26/2013 - 13:22

lazzy, to be fair mate you're best setting the tempo yourself in my experience anyway, i disabled midi sync a while back and it seems much more solid to me and didn't like all the midi data that was being transmitted back to my DAW, as when the temp chanegs are sent, they seem like they're relayed back by the MN.  Lot's of traffic!

The noise you're getting is due to the large amount of usb data being transmitted and is being picked up as interference via your audio connections, you should seriously consider moving your audio hardware and pc into the same mains outlet - It can't be doing your equipment any good having this going on.

Ted 3000
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Joined: 03/26/2013 - 13:27

Aha, THAT kind of crackling! I get this sometimes. For example:

  • If you are using something audible like a tempo-synced delay;
  • and the MiniNova's BPM is fluctuating around trying to stay in sync with MIDI clock out of Ableton or some hardware gear, then;
  • you'll get the same crackling sound you'd get if you were changing the delay time via a knob.

SLEW can help on those parameters that have it. The problem is the sharp stairstep value jumps on a parameter that is sensitive to tempo, since MIDI clock sync is constantly being scanned and the BPM adjusted slightly. Yet another reason to set tempo manually when possible.

mikenovation
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Joined: 04/04/2013 - 17:10

Hi, for more support please contact Novation Tech Suport @  http://us.novationmusic.com/support/contact-support

Thanks