On Thu, 29 Nov 2001 19:09:07 -0500
Doug McGarrett
Forgive me if I don't understand the question, since I am not familiar with xawtv. However, I am somewhat familiar with TV. In the US, the sound carrier is always exactly 4.5 MHz above the picture carrier. In Europe, they use a different number, but I don't have the information at my fingertips. (I may have it at work. If you need to know the values, I will look, just ask. You will get an answer no later than Monday, assuming I have the information.) OTOH, the information is surely on the 'Net. Try "sound carrier" on Google and see what it brings.
BTW, don't use the expression "image frequency" to mean the freq of the picture carrier. "Image frequency" has a specific meaning in the RF world, and has to do with superheterodyne systems.
Doug, No doubt Constant will provide more information in due course, but FWIW so far as I can see there is no ability in xawtv to tune the sound frequency separately from the picture carrier. There is the usual ability to fine-tune what I will call the overall frequency (-128 or +127), and that can affect the quality of sound, but I am not aware of anything else. There is a choice from 16 frequency tables, including various cable options and the europe-west that I use. There is also a choice from several TV-norm settings, including the various PALs NTSC and SECAM. The config file is in simple form. I am including mine below. Regards, Geoff [global] freqtab = europe-west pixsize = 128 x 96 pixcols = 1 jpeg-quality = 75 mjpeg-quality = 75 toggle-mouse = 0 keypad-ntsc = no osd = yes # [Station name] # capture = overlay | grabdisplay | on | off # input = Television | Composite1 | S-Video | ... # norm = PAL | NTSC | SECAM | ... # channel = # # fine = # (-128..+127) # key = keysym | modifier+keysym # color = # # bright = # # hue = # # contrast = # [defaults] norm = PAL capture = grabdisplay input = Television [C5] channel = 48 [BBC2] channel = 62 fine = -5 [ITV] channel = 59 [C4] channel = 65 [BBC1] channel = 55 contrast = 40% _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com