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01-11-2014, 08:39 AM
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#1
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Human being with feelings
Join Date: Jan 2014
Posts: 4
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High frequency sound when bass drum hits
Hi! I'm having a problem where when I record my drum machine into reaper, there is a high frequency sound made when the bass drum hits. I have previously recorded with the same setup, but did not hear this sound until today. I am using a korg volca beats running into an alesis multimix 6 and using ASIO. The drums sound fine through my headphones, I only hear the sound when I play back what was recorded. Any tips on what is causing this?
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01-11-2014, 10:14 AM
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#2
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Human being with feelings
Join Date: Jan 2014
Posts: 4
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hear is a file of the sound. When the kick hits, there is another frequency above it that isn't there until I record it in reaper. Thanks!
https://app.box.com/s/h1wrfdinkjow8u67g0gf
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01-11-2014, 02:32 PM
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#3
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Human being with feelings
Join Date: Aug 2009
Location: NYC
Posts: 1,805
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This is kinda strange. When I play the file through my M-Audio BX-5's it sounds like a normal kick sample. But when I route through my headphones (Ultrasone Proline 650's) I hear almost exclusively the higher pitched tone. And through my Jaybird Blue Buds X, there is a little more of the normal kick sound, but there's still a significant amount of that higher frequency.
That high frequency tone sounds closest to B4, which is just under 1000 Hz. The other strange thing is that looking at the signal through Voxengo Span, there is actually a sharp dip at the 1000 Hz frequency. Very strange indeed.
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01-11-2014, 02:43 PM
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#4
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Human being with feelings
Join Date: Aug 2009
Location: NYC
Posts: 1,805
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Upon closer look in Izotope RX3, its clear where the tone is coming from. I'm wondering if it was always there.
AnthonyR, do you have an older recording of that same kick sample that you could post?
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01-12-2014, 10:53 AM
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#6
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Human being with feelings
Join Date: Sep 2008
Location: Sweden
Posts: 7,416
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Does not Chris' spectrum analysis with those spikes a 1k, 2k, 3k, etc look very similar to this:
I get this from my vintage drum machine Korg DDD-1, and asked a question about it here
http://forum.cockos.com/showthread.php?t=84757 The main difference would seem to be that for me the high-pitched sound is continuous, not only when the drum kicks. I solved it by notching out those frequencies, and that works ok.
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01-12-2014, 12:31 PM
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#7
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Human being with feelings
Join Date: Aug 2009
Location: NYC
Posts: 1,805
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Quote:
Originally Posted by AnthonyR
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It seems that its just part of the sound generation in your drum machine. What I can't figure out for myself is why, in my headphones that have particularly good bass response, that my ears go only to those higher frequencies and I lose most of the "kick".
Quote:
Originally Posted by Fabian
Does not Chris' spectrum analysis with those spikes a 1k, 2k, 3k, etc look very similar to this:
I get this from my vintage drum machine Korg DDD-1, and asked a question about it here
http://forum.cockos.com/showthread.php?t=84757 The main difference would seem to be that for me the high-pitched sound is continuous, not only when the drum kicks. I solved it by notching out those frequencies, and that works ok.
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This is a great suggestion. And thank you for sharing your experience. I do wonder that with a continuous whining sound, that its not a power or audio cable issue. Or, that's just how an older drum machine works. I would also use a noise gate in conjunction with various levels of EQ, as to not remove all of those upper harmonics.
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01-12-2014, 12:59 PM
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#8
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Human being with feelings
Join Date: May 2009
Posts: 29,260
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Quote:
Or, that's just how an older drum machine works.
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Never seen it with mine (when I used them) and if this where the case I'd expect to have heard it minus the DAW. I have to wonder about the circuit path etc., impendence, grounds and other stuff. It doesn't sound like those directly but some condition could be created that causes this as a side-effect. I'd want to hear it directly from the device minus the DAW to narrow it down.
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Music is what feelings sound like.
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01-12-2014, 01:35 PM
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#9
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Human being with feelings
Join Date: Jan 2014
Posts: 4
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Well, to respond to some of this: It's not an old drum machine, actually new - korg volca beats. The sound is not present when just listening to the drum machine through headphones or monitors, it only comes out once recorded and played back. Also, whenever I open reaper I get the same high pitched hum I've seen others mention, which may play a part in this. I'm starting to think its probably the cheap alesis multimix 6, which others have said gave them a hum.
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01-12-2014, 01:39 PM
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#10
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Human being with feelings
Join Date: May 2009
Posts: 29,260
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Quote:
Also, whenever I open reaper I get the same high pitched hum I've seen others mention, which may play a part in this. I'm starting to think its probably the cheap alesis multimix 6, which others have said gave them a hum.
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I think this or something similar is looking in the right general direction. Can you bypass the MM6 completely as a test?
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Music is what feelings sound like.
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01-12-2014, 02:04 PM
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#11
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Human being with feelings
Join Date: May 2009
Posts: 29,260
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I downloaded the above file and I had to dig hard to find this in Spectral Layers and SPAN. It's at least 30 dB down and I don't even see the 1k one, only above that. Couple things, this sample looks like a processed sine wave not a real sample (like what you would get if you used a tone generator+gate to create a kick). With that in mind the clickyness sounds added or there was a clip event or something.
Are we 100% sure this doesn't exist pre record? Finally, it provides most of the clicky sound to this kick, I think the quality of the sample is more to blame at the moment (or something is happening to it on the way in, bit depth etc).
I think this might be a byproduct of the sample itself or purposeful processing by the vendor. It looks horrible when I look at it next to a real kick sample. Can you throw a frequency analyzer when record armed and see if it appears there when monitoring and not recording? Had someone else not alerted me, I would have NEVER seen those 2,4k harmonics because they are completely off my analyzer graph (even when normalized) unless I go out of my way to zoom/zone in and find them. My current thinking is that it is an intentional quality of that sample or it clipped somewhere in some way that wasn't noticed.
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Last edited by karbomusic; 01-12-2014 at 02:15 PM.
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