Bug in Spectrum Analysis Tool? -Sound Forge - PC - MAGIX Community Forums Archive

Subject:Bug in Spectrum Analysis Tool? Posted by: Jeff Lichtman Date:5/29/2007 8:41:06 PM In previous versions when using the spectrum analysis tool it would recalculate the peak when I zoomed in to reflect only the displayed portion of the spectrum. This no longer happens in 9.0 - the displayed peak remains the same regardless of how I zoom. This is a problem for me - I often zoom to learn the frequency of a particular peak. Is there some way of doing this in 9.0? If not, could it be changed to work the way it did in 8.0 and previous versions? Thanks.
Subject:RE: Bug in Spectrum Analysis Tool? Reply by: ForumAdmin Date:5/30/2007 6:50:17 AM This has changed slightly, but the information is still available. The Peak field in the "static" spreadsheet portion of SA statistics now reflects the peak for the range analyzed (not necessarily displayed). The left "dynamic" portion of the SA statistics indicates the zoom area and frequency/dB value at the mouse position. Note that it also reflects the peak for the range displayed. It is only active when the mouse is in a spectrum window, which may be the source of confusion. J.
Subject:RE: Bug in Spectrum Analysis Tool? Reply by: Jeff Lichtman Date:5/30/2007 9:13:15 PM I saw that the frequency corresponding to the mouse position is displayed on the left of the SA. This forces me to find the peak with the mouse to see what the maximum value is in a range, which is more work with less accuracy than I had in 8.0, where I could simply zoom in on a peak and be told immediately what the frequency was. I use Sound Forge to remaster 78s. The recording speeds of these old records were not standardized or well adhered-to, so one of the things I have to do for each record is find the correct playback speed. My technique for doing this is to compare the frequencies of notes in the recording to what they "should" be with concert A = 440 Hz. Often the most "interesting" frequency is not the most prominent - for example, with both a piano and a string bass, I want the frequency of the piano notes, not the bass notes (since the piano will be in tune). In version 8.0 I would zoom in such a way as to exclude the bass frequencies, and it would tell me the fundamental of the piano. With 9.0 I will either have to zoom in on a peak and use the mouse to find out its frequency or use an equalizer to filter out the frequencies I don't want to measure. Either way, it's more work. This wouldn't be a problem if I had to do it only once for each recording, but it's something I do for perhaps 25 or 30 samples within a recording.
Subject:RE: Bug in Spectrum Analysis Tool? Reply by: ForumAdmin Date:5/31/2007 7:55:10 AM Look again. In the left statistics area, you should see: Frequency (Hz): Decibels (dB): FFT Bin: Peak: The last one is the peak in the current view, not dependent on mouse position (other than the mouse having to be in a graph for it to show up). J.
Subject:RE: Bug in Spectrum Analysis Tool? Reply by: Jeff Lichtman Date:5/31/2007 7:27:24 PM OK, thanks. That answers my question. The bug was with my eyes, not with the product.

Subject:Bug in Spectrum Analysis Tool?

Date:5/29/2007 8:41:06 PM

In previous versions when using the spectrum analysis tool it would recalculate the peak when I zoomed in to reflect only the displayed portion of the spectrum. This no longer happens in 9.0 - the displayed peak remains the same regardless of how I zoom. This is a problem for me - I often zoom to learn the frequency of a particular peak. Is there some way of doing this in 9.0? If not, could it be changed to work the way it did in 8.0 and previous versions?

Thanks.

Subject:RE: Bug in Spectrum Analysis Tool?

Reply by: ForumAdmin

Date:5/30/2007 6:50:17 AM

This has changed slightly, but the information is still available.

The Peak field in the "static" spreadsheet portion of SA statistics now reflects the peak for the range analyzed (not necessarily displayed).

The left "dynamic" portion of the SA statistics indicates the zoom area and frequency/dB value at the mouse position. Note that it also reflects the peak for the range displayed.

It is only active when the mouse is in a spectrum window, which may be the source of confusion.

J.

Subject:RE: Bug in Spectrum Analysis Tool?

Reply by: Jeff Lichtman

Date:5/30/2007 9:13:15 PM

I saw that the frequency corresponding to the mouse position is displayed on the left of the SA. This forces me to find the peak with the mouse to see what the maximum value is in a range, which is more work with less accuracy than I had in 8.0, where I could simply zoom in on a peak and be told immediately what the frequency was.

I use Sound Forge to remaster 78s. The recording speeds of these old records were not standardized or well adhered-to, so one of the things I have to do for each record is find the correct playback speed. My technique for doing this is to compare the frequencies of notes in the recording to what they "should" be with concert A = 440 Hz. Often the most "interesting" frequency is not the most prominent - for example, with both a piano and a string bass, I want the frequency of the piano notes, not the bass notes (since the piano will be in tune). In version 8.0 I would zoom in such a way as to exclude the bass frequencies, and it would tell me the fundamental of the piano. With 9.0 I will either have to zoom in on a peak and use the mouse to find out its frequency or use an equalizer to filter out the frequencies I don't want to measure. Either way, it's more work. This wouldn't be a problem if I had to do it only once for each recording, but it's something I do for perhaps 25 or 30 samples within a recording.

Subject:RE: Bug in Spectrum Analysis Tool?

Reply by: ForumAdmin

Date:5/31/2007 7:55:10 AM

Look again. In the left statistics area, you should see:

Frequency (Hz):
Decibels (dB):
FFT Bin:
Peak:

The last one is the peak in the current view, not dependent on mouse position (other than the mouse having to be in a graph for it to show up).

J.

Subject:RE: Bug in Spectrum Analysis Tool?

Reply by: Jeff Lichtman

Date:5/31/2007 7:27:24 PM

OK, thanks. That answers my question. The bug was with my eyes, not with the product.