Search found 87 matches

by cdeamaze
Sat Aug 11, 2007 1:31 am
Forum: GoldWave General
Topic: Spectrum Analyser
Replies: 6
Views: 6227

Spectrogram

For songs, a very powerful tool in spectrum analysis is called spectrogram. Instead of the usual spectrum, which is amplitude vs freq, we can plot a spectrogram, which is a two-dimensional (freq vs time)description of sheet music. Using "Twinkle, Twinkle Little Star" as an example, the picture below...
by cdeamaze
Fri Jul 20, 2007 10:49 pm
Forum: GoldWave General
Topic: file formats
Replies: 2
Views: 2005

file formats

file saved as big endian, reopened the same file again, the attributes would change to little endian. Q. How do I prevent goldwave from changing the file attributes??? Ans. You can't prevent goldwave from changing the file attributes, this is a software issue. As such, the job belongs to Chris and ...
by cdeamaze
Thu Jul 12, 2007 3:00 am
Forum: GoldWave General
Topic: How to save to .mp3 format faster...
Replies: 10
Views: 3833

First, let's determine the file size involved (see How to cut file size ). By direct calculation, your 5-hour .wav file size is 3.175GB. By contrast your .mp3 file size is, 10 times smaller, at 288MB. Fast save requires a high performance hard drive, if you love buying hardware: 1. bigger Cache Find...
by cdeamaze
Tue Jul 10, 2007 2:30 pm
Forum: GoldWave General
Topic: adding noise
Replies: 7
Views: 3362

adding noise

is it under Tool | expression evaluator | and in "preset" there's suppose to be all the different noise? because under the "preset" its empty. is it because im using the free trial version? Yes, it is under Tool | Expression evaluator ( a shortcut is to use expresseion evaluator button on the tool ...
by cdeamaze
Thu Jul 05, 2007 8:25 pm
Forum: GoldWave General
Topic: adding noise
Replies: 7
Views: 3362

adding noise

You don't need to record noise yourself. Goldwave has some built-in features which you can take advantage. For example, if you want to add white noise or hiss, click on expression evaluator button, under group name(version 4) or presets(version 5) select Noise, then you can select white noise, hiss ...
by cdeamaze
Mon Jun 25, 2007 9:49 pm
Forum: GoldWave General
Topic: Remove music and leave vocals
Replies: 2
Views: 4088

Remove music and leave vocals

There is a post which discusses this subject in great details. see recovering vocals
by cdeamaze
Mon Jun 25, 2007 9:23 pm
Forum: GoldWave General
Topic: how to record my voice into a music?
Replies: 2
Views: 1672

how to record my voice into a music?

There is a post which serves an example of adding vocals to background music. The post uses "Twinkle, Twinkle Little Star" as an example to create stereo background music first, then adds my vocals later. See adding vocals.
by cdeamaze
Thu Nov 02, 2006 12:19 am
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

Thanks, DougDbug, for your great insight!

I never thought about copyright issue has played such an impotant role until you pointed out!
by cdeamaze
Wed Nov 01, 2006 8:01 pm
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

The problem is not due to song creators but lack of info by the end users or whoever needs to process the signals. The song creators may have complete knowledge of V but the end users don't. Why can't they pass that piece of info to the end users whether explicitly( in terms of V) or implicitly (in ...
by cdeamaze
Wed Nov 01, 2006 5:31 pm
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

If you are a song creator and when you add vocals, you can certainly generate RD when you generate L and R signals knowing that it is an absolutely essential piece of info. In other word, you don't calculate RD from L and R, you generate all three. The point I try to make is this: when you add vocal...
by cdeamaze
Wed Nov 01, 2006 3:53 pm
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

How about if we introduce the third equation: RD=MR-ML+V by assuming RD is available which can be generated when we add the vocal We now have 3 equations with 3 unkowns Sum(S) L+R = ML + MR + 2V Difference(D) L-R= ML-MR Reverse Diff (RD) RD= MR-ML+V The availability of RD will guarantee the solution...
by cdeamaze
Wed Nov 01, 2006 11:23 am
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

Can anyone explain the past attempts to manipulate the L+R, L-R, Left-only, or Right-only signals to remove or extract signals. Their assumptions, successs, failure and conclusion.
by cdeamaze
Wed Nov 01, 2006 4:11 am
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

Chris, can you tell me what kind of signals are available for recovering vocals? I'm not familiar with current recovering technology. Can we assume sum and difference are available? What do you mean by negative difference? Can we assume it is also available? Where can we get some references on this ...
by cdeamaze
Tue Oct 31, 2006 10:21 pm
Forum: GoldWave General
Topic: Recovering Vocals by removing background music
Replies: 11
Views: 8024

Recovering Vocals by removing background music

In Removing vocals , it is observed that if reverse difference signal is available, we can recover both right channel and left channel signals. In addition, if both difference and reverse difference signals are available, we can recover vocals by simply mixing these two signals (Diff+ Rev Diff). It ...
by cdeamaze
Tue Oct 31, 2006 4:23 pm
Forum: GoldWave General
Topic: Removing vocals
Replies: 5
Views: 5603

Removing Vocals - New Trick just in time for Halloween!

If you create new left and right channel signals by using sum+vocal(Left) and difference+vocal(Right) of the original channels, then you can use a new trick "Right - Left" to recover the original left channel signal. Using old trick, after Effect -> Stereo -> Reduce Vocals, you get a signal which mi...