What kind of Distortion is this?

Archived from groups: rec.audio.pro (More info?)

"Joe Mama" <bloodywanker@drugsmakemecool.com> wrote in message
news:41fdede0$0$2674$afc38c87@news.optusnet.com.au...
> Sean Conolly wrote:
> > I have a talent for finding new ways make things sound bad, but I've
never
> > seen this kind of distortion on a signal. Here's a small GIF (16K):
> > http://www.rmmpnet.org/members/sean/kick_dist.gif
> >
> >
> Looks to me like REALLY fast compression.
>
> HTH,
> joe.

Looks to me like a static discharge/recovery followed by progam audio.


--
Best Regards,

Mark A. Weiss, P.E.
www.mwcomms.com
-

Archived from groups: rec.audio.pro (More info?)

"Mark & Mary Ann Weiss" <mweissX294@earthlink.net> skrev i en meddelelse
news:FamLd.3253$S3.2266@newsread2.news.atl.earthlink.net...
>
> "Joe Mama" <bloodywanker@drugsmakemecool.com> wrote in message
> news:41fdede0$0$2674$afc38c87@news.optusnet.com.au...
> > Sean Conolly wrote:
> > > I have a talent for finding new ways make things sound bad, but I've
> never
> > > seen this kind of distortion on a signal. Here's a small GIF (16K):
> > > http://www.rmmpnet.org/members/sean/kick_dist.gif
> > >
> > >
> > Looks to me like REALLY fast compression.
> >
> > HTH,
> > joe.
>
> Looks to me like a static discharge/recovery followed by progam audio.
>
>
> --
> Best Regards,
>
> Mark A. Weiss, P.E.
> www.mwcomms.com
> -
>
>
>

And by the way.... How much time does the GIF cover ? Is it 10ms, 100ms, or
?

/Jakob

Archived from groups: rec.audio.pro (More info?)

On Mon, 31 Jan 2005 01:24:03 -0500, "Sean Conolly"
<sjconolly_98@yaaho.com> wrote:

>I have a talent for finding new ways make things sound bad, but I've never
>seen this kind of distortion on a signal. Here's a small GIF (16K):
>http://www.rmmpnet.org/members/sean/kick_dist.gif
>
>... and here's a snippet of some of the examples from the track pasted
>together (600K):
>http://www.rmmpnet.org/members/sean/kick_dist.wav
>Pull this into an editor and take a close look at what's happening around
>the extreme peaks.
>
>This is an Audix D6 through an RNP into a MOTU 1296, and no processing other
>than reducing to 16 bits. Obviously I was clipping something, but what? It
>doesn't look like the kind of digital clipping that I'm familiar with. Is
>this what happens if you overdraw the current for the preamp circuit?
>
>FWIW the meters on the MOTU were nowhere near peak values while I was
>recording this.
>
>Thanks in advance,
>Sean
>

That apparent inversion of the positive peak of the waveform, after
the initial 'click', is interesting, expecially since the click itself
achieved higher peak values. It looks as if there is analog circuitry
which clips more easily at low frequencies than at high frequencies.

I would guess that the LF which clipped and inverted phase was around
100 Hz. Can't blame the transformer in the RNP, it hasn't got one.

When you learn more, please post.

Mike T.

Archived from groups: rec.audio.pro (More info?)

I am not a drummer so this is an amateur imho in an area where I have no
experience.

Sounds like the mic is getting a mechanical hit by a drum and not an
electrical problem at all.



"Sean Conolly" <sjconolly_98@yaaho.com> wrote in message
news8kLd.5386$BQ2.1285@bignews6.bellsouth.net...
>I have a talent for finding new ways make things sound bad, but I've never
> seen this kind of distortion on a signal. Here's a small GIF (16K):
> http://www.rmmpnet.org/members/sean/kick_dist.gif
>
> ... and here's a snippet of some of the examples from the track pasted
> together (600K):
> http://www.rmmpnet.org/members/sean/kick_dist.wav
> Pull this into an editor and take a close look at what's happening around
> the extreme peaks.
>
> This is an Audix D6 through an RNP into a MOTU 1296, and no processing
> other
> than reducing to 16 bits. Obviously I was clipping something, but what? It
> doesn't look like the kind of digital clipping that I'm familiar with. Is
> this what happens if you overdraw the current for the preamp circuit?
>
> FWIW the meters on the MOTU were nowhere near peak values while I was
> recording this.
>
> Thanks in advance,
> Sean
>
>

Archived from groups: rec.audio.pro (More info?)

> But I forgot to mention that the mic is attached to an internal mount. It
> has a rubber isolater and seems to be loose enough to not get hammered,
but
> I could be underestimating the power of a good hit (I have a rep for being
> kinda loud on the kick).
>
> I'll try putting the mic on stand, and again with the pre turned down
more,
> that may help isolate the problem.
>
> Sean
>


Is it a Randal May ( MayEA ) mic mount? Just curious. I'm wondering if that
dip after the initial peak is caused by mechanical energy traveling through
the shell and up through the mount and since it travels slower through the
shell and mount than through the air it's delayed and out of phase.

John L Rice
Drummer@ImJohn.com

Archived from groups: rec.audio.pro (More info?)

On Tue, 01 Feb 2005 09:19:35 +0100, Edi Zubovic <edi.zubovic[rem
this]@ri.htnet.hr> wrote:

>On Mon, 31 Jan 2005 01:24:03 -0500, "Sean Conolly"
><sjconolly_98@yaaho.com> wrote:
>
>>I have a talent for finding new ways make things sound bad, but I've never
>>seen this kind of distortion on a signal. Here's a small GIF (16K):
>>http://www.rmmpnet.org/members/sean/kick_dist.gif
>>
>>... and here's a snippet of some of the examples from the track pasted
>>together (600K):
>>http://www.rmmpnet.org/members/sean/kick_dist.wav
>>Pull this into an editor and take a close look at what's happening around
>>the extreme peaks.
>>
>>This is an Audix D6 through an RNP into a MOTU 1296, and no processing other
>>than reducing to 16 bits. Obviously I was clipping something, but what? It
>>doesn't look like the kind of digital clipping that I'm familiar with. Is
>>this what happens if you overdraw the current for the preamp circuit?
>>
>>FWIW the meters on the MOTU were nowhere near peak values while I was
>>recording this.
>>
>>Thanks in advance,
>>Sean
>>
>
>Just a thought -- It might be an overload by very powerful and fast
>transients in deep LF area. VU meters wouldn't show this. A _very_
>fast peak program meter without weighting maybe would. I think A/D
>converters can go mad in such situations -- too much LF energy in a
>short time. Filter it prior to re-recording.
>
>
>Edi Zubovic, Crikvenica, Croatia

Oh still an another one -- was the microphone membrane really very
close to the bass drum?

Edi Zubovic, Crikvenica, Croatia

Archived from groups: rec.audio.pro (More info?)

"Sean Conolly" <sjconolly_98@yaaho.com> wrote in message
news:eEDLd.14321$gS5.2126@bignews3.bellsouth.net...

> But I forgot to mention that the mic is attached to an internal mount. It
> has a rubber isolater and seems to be loose enough to not get hammered,
but
> I could be underestimating the power of a good hit (I have a rep for being
> kinda loud on the kick).
>
> I'll try putting the mic on stand, and again with the pre turned down
more,
> that may help isolate the problem.

Is everything screwed together really tightly? Like the mic clip and
whatever it's attached to? Is the cable banging around? Does it make noises
in the signal when you wiggle it?

Peace,
Paul

Archived from groups: rec.audio.pro (More info?)

Could also be a power supply sag in the RNP but I doubt it...

Archived from groups: rec.audio.pro (More info?)

"hank alrich" <walkinay@thegrid.net> wrote in message
news:1gr9xx4.ftgsek28ww00N%walkinay@thegrid.net...
> John L Rice wrote:
>
> > Is it a Randal May ( MayEA ) mic mount? Just curious. I'm wondering if
that
> > dip after the initial peak is caused by mechanical energy traveling
through
> > the shell and up through the mount and since it travels slower through
the
> > shell and mount than through the air it's delayed and out of phase.
>
> I've run into one kit with that mounting system in the kick drum. Great
> drummer playing with Tony Furtado. Had a D112 inside the kick, and I
> expected it to sound like a basketball in a grain silo, but it didn't.
> In fact, it sounded very good, as did every aspect of the guy's kit. In
> that case the May mount didn't mess up anything.
>
> --
> ha

I actually used to have quite a few MayEAs in my drums, before those drums
were stolen by some FPOSCHMFCSSEL ( assign you favorite swear words to the
letters, fun for parties ) and I always thought they worked well. I do
think that if you are going to use them some light acoustical treatment
inside the drum could help. ( especially if you are more concerned as to
how the drum sounds on the inside as opposed to how it sounds outside.
Someday, I'll do that experiment and report back here.

John L Rice
Drummer@ImJohn.com