192 
After the impulse file is recovered, it may still require minor trimming. In general, you should try to make the impulse response as short as possible to increase processing speed when using Acoustic Mirror. Impulse files greater than 131,071 samples (about 3 seconds) in length require substantial processing time. When possible, trim the impulse response to less than 65,535 samples (about 1.5 seconds). In addition, we recommend fading the tail of the impulse. Of course, this is not always an option when dealing with spaces that produce extended reverberations.
1.Open the recovered impulse file in Sound Forge and play it.
2.Delete any silence or
3.Save the trimmed impulse response file using the standard WAV format.
Tip: To prevent phase problems when mixing the dry and wet signals, you may also want to verify the phase of the impulse file. The file should begin by going positive (above the centerline). If the impulse file has a negative (below the centerline) phase, choose Invert/Flip from the Process menu.
Adding summary information to your impulse fileIf you plan on sharing impulses with other Sound Forge users, we recommend adding summary information and BMP images to your files.
1.Open the impulse file in Sound Forge.
2.From the File menu, choose Properties. The Properties dialog appears.
3.Click the Summary tab.
4.Enter the appropriate information in each box.
5.Click the Picture button. The Open Picture dialog appears.
6.Locate the desired image and click Open. The image is linked to the impulse file.
7.Click OK.
Note: If you are using a palletized display setting (256 colors or less) and attach a bitmap to an impulse file, the bitmap colors are distorted when viewed in Acoustic Mirror. This is because Sound Forge converts the bitmap using the default palette at the time of attachment, which is not optimal. For this reason, you should set the display settings to at least a 16- bit palette prior to attaching bitmaps to impulse files.
USING ACOUSTIC MIRROR AND WAVE HAMMER | CHP. 12 |