Become a Site Supporter and Never see Ads again!

Author Topic: Small blip of increase in waveform amplitude, what's the cause and how to fix?  (Read 750 times)

0 Members and 1 Guest are viewing this topic.

Offline rigpimp

  • Trade Count: (14)
  • Taperssection All-Star
  • ****
  • Posts: 1951
  • Gender: Male
  • Jarts don't kill people!
ycoop, you following along at home?    :P
Mics: Schoeps MK5 G MP, Schoeps CCM 4 Lg MP, Schoeps MK8 MP, nBob cables > PFA, KCY 250/5 > PFA
Pre/A>D/P48: Sonosax SX/M2, Sonosax SX/M2-LS, E.A.A. PSP-2, Naiant Tinybox, Neumann BS48i-2 (for sale)
Recorders: Sound Devices Mixpre-6, Sony PCM-M10
Playback: McIntosh MC2105 > McIntosh C39 > Von Schweikert VR-4 JR
http://archive.org/bookmarks/kskreider

Offline ycoop

  • Trade Count: (1)
  • Taperssection Regular
  • **
  • Posts: 242
  • Gender: Male
Well at work, but yeah.

Don’t have access to Audition, maybe Audacity’s click removal will work.
Avantone CK-1s > DR-60d mkII, DR-22wl

Offline bombdiggity

  • Trade Count: (11)
  • Needs to get out more...
  • *****
  • Posts: 2225
I'd think any of them would on something simple like this.  It can be trial and error playing with the settings and profiles a bit to get what works best.  Audition has four models in the click and pop and a bunch of settings but I think I more or less rely on one of the defaults. 
Gear:
Audio:
Schoeps MK4V
Nak CM-100/CM-300 w/ CP-1's or CP-4's
SP-CMC-25
>
Oade C mod R-44  OR
Tinybox > Sony PCM-M10 (formerly Roland R-05) 
Video: Varied, with various outboard mics depending on the situation

Offline ycoop

  • Trade Count: (1)
  • Taperssection Regular
  • **
  • Posts: 242
  • Gender: Male
Audacity click removal was not successful. Tried the zero crossings cut from other channel which resulted in a small blip when the cut happens as the two tracks don’t have zero crossings at the exact same locations. I know I could do a fade in/fade out on a new track before and after the cut and then merge the tracks, but that seems like overkill when my original solution was satisfactory.

Avantone CK-1s > DR-60d mkII, DR-22wl

Offline Gutbucket

  • record > listen > revise technique
  • Trade Count: (13)
  • Needs to get out more...
  • *****
  • Posts: 12233
  • Gender: Male
Zoom way, way, way in on the edit point until you see the discrete sample points of the waveform.  Manually drag a few sample points to smooth out the sharp discontinuity and that will nick the blip.
volition > vibrations > voltages > numeric values | numeric values > voltages > vibrations> virtual teleportation time-machine experience
made easy- >>Improved PAS table<< | made excellent- >>click here to download the Oddball Microphone Technique illustrated PDF booklet<<

Offline morst

  • Archivist: Camper Van Beethoven & Cracker
  • Trade Count: (1)
  • Needs to get out more...
  • *****
  • Posts: 2629
  • Get in touch if you wanna record Cracker or CVB!
    • Soundscape Preservation Society
Zoom way, way, way in on the edit point until you see the discrete sample points of the waveform.  Manually drag a few sample points to smooth out the sharp discontinuity and that will nick the blip.
Yeah, just pencil-tool right over it, if that's easier. It's just an unwanted noise, right?
Teams: Neumann, Bay Area Tapers, Multitrack, Pioneertown Tapers, Mac Geeks, Cassette Masters, Poster Collectors, Alumni of teams St Louis, Upper Midwest & Milwaukee / Southern Wisco

Offline Ben Turnbull

  • Don't ask me about Audacity...
  • Trade Count: (14)
  • Needs to get out more...
  • *****
  • Posts: 8625
  • Gender: Male
  • A Clark Nova ate my lunch... Don't ask, just pee
Click repair will normally work... what bugs me more is the cause of this particular wave form/deform.  I've never pressed the issue and have always attributed it to some sort of power irregularity. Screwed up as it looks, most of the time it will "track" without a major glitch.  YMMV  :shrug:
Who came first, Dave King or Zack Galifianakis?...
-My name is Ben, and I'm an AQhaulic ranting hysterically in my dotage
Official Archivist for Jazz Central Studios, MinniMN
DPA4021/SKM140/NakCM1k/ADK A51s/Countryman B3/ATes943/SPc4/och... > TinyBox OT> PCM-M10/DR-680/R4/T+mod UA5 needs attention

Offline relefunt

  • Trade Count: (7)
  • Taperssection Regular
  • **
  • Posts: 63
  • Gender: Male
    • Milwaukee Taper
I've been following this thread and reading some replies by some very smart and knowledgable people. I thought maybe we might be able to use some thoughts on the issue from someone not so smart and not so technically knowledgable (me).

If one were using Audacity I would recommend first trying the repair tool. If the noise is too many samples long in duration for that, then click repair sometimes works (there are adjustments to how sensitive and specific the tool is -- that can have an effect on what type of click is removed), or even splitting the channels, highlighting the noise, and using negative numbers with the amplify tool until it resembles the baseline, then attaching the channels back to a stereo track.

In terms of "what's the cause" -- there are countless causes of noise, as people have pointed out. Loose cables, RF interference, loose wire in the mic, a power surge from the battery/power source, and I also sometimes wonder about static electrical discharges when touching the gear to make adjustments.

Good luck. Sometimes I record a show and there are a dozen or so UNOs (Unidentified Noisy Object) and other times there are none. i wish i could see a pattern. Maybe someday. Thanks to all the people who contributed to this thread -- i continue to learn quite a bit on TS and I really do appreciate your time and effort.
« Last Edit: June 20, 2018, 03:13:09 AM by relefunt »
Beyerdynamic MC930, Nakamichi cm300, CA11c, CA14(c,o) and AT853(c,o)
Shure FP24, Audioroot Femto, CA9100, CA9200
Edirol R44 and R09HR, Sony M10, Roland R05, Tascam DR-70D
milwaukeetaper.com

 

RSS | Mobile
Page created in 0.187 seconds with 35 queries.
© 2002-2018 Taperssection.com
Powered by SMF