Slight pitch stick mod wheel problem...

Henrico · Joined: Nov 25, 2005 Posts: 4 Location: London

Hi there,

I just bought a nord g2 2nd hand and I'm just loving it! However, I've just noticed that there is a slight squeaking noise as I move the pitchstick and mod wheel thats noticeable at high volume. Does anyone know of this problem? I had a quick search on the forum but couldnt find any reference to it.

Best regards,
Henrico.

mosc · Posted: Sat Nov 26, 2005 12:53 pm Post subject:

Hi, Henrico, and welcome

to electro-music.com

I haven't heard of this problem before. It sounds like the stick and wheel are rubbing against the metal of the case - the front panel. You may be able to open up the unit and carefully adjust the small assembly that holds the pitch stick and the mod wheel. Maybe it got bent in the care of the previous owner. If you are handy, this won't be too difficult. If not, you may be happier taking it to a good synth or organ technician.

Blue Hell · Posted: Sat Nov 26, 2005 1:28 pm Post subject:

The "at high volumes" bit makes me wonder if it's maybe zipper noise ?

Zippr noise is due to quanization, the physical controllers are read in at a certain resolution causing tiny steps in the signal even if the motion of the controller is continues. Such little jumps, when not properly filterd, can cause audible artifacts (depending on how the controllers are used in a certain patch).

Does it occur in all patches ?

Henrico · Joined: Nov 25, 2005 Posts: 4 Location: London

Hi, sorry for the delay Smile

I think it happens in most patches but not in the louder ones (probably is but I cant hear it!). I dont think its bent because its in VERY good condition - even the manual is still in its bubble wrap!

Kassen · Posted: Mon Dec 19, 2005 12:55 pm Post subject:

Just for kicks; could you see wether you can create a patch where the note signal (including the pitch mod) gets lowpass filtered before affecting the oscilators and which still suffers from this noise? You see; that would cure the "when not properly filtered" condition Jan mentioned.

Typically Pitch bend shouldn't do this; that's quite a high resolution signal; if you hear that under normal circumstances you'd need extraordinarily good speakers and matching ears (which may well be the case). Modulation is just another continuous controler and so that one could cause crackling under some circumstances. Filtering or smoothing will fix that just fine. it hink it's a good idea to filter controlers that are used when playing or sequencing anyway if you can spare the dsp load.

It could also be some odd electricity problem leaking into the audio chain in some way. If you're comfortable with screwing gear open you could screw the G2 open and look at all cables running between print boards. It never hurts to make sure all connections like that are pressed firmly in their sockets before asuming something is broken.

AngusHastie · Posted: Tue Dec 20, 2005 10:11 am Post subject:

I'm a bit confused. Are you saying this is:
a) a sound coming from a physical construction fault in the unit even if you didn't have it powered up, or
b) an unwanted audio signal being generated by a patch?
In your first post, you say it happens at high volume which suggests (b) but in your second post you say you can't hear it if you have it turned up loud which suggests (a)...
If (a), go with Mosc's advice. If (b), you need to post the gulity patch on the forum.