Hi; I have just clean installed Fedora Core 4 and I am having a problem with squawks and hisses from my speakers. I am using Ensoniq 5880 AudioPCI and an ATI TV Wonder tuner. The ALSA sound driver, bttv, the volume control mixer and tvtime where recently installed as a clean install of FC4. The noises where present but barely noticeable under FC3. I am also using Windows XP on another hard-drive and have no problems with either my TV reception or my sound. For comparison purposes my Window's mixer has the following settings: Windows XP Vol Control: 40% Wave: 40% SW Synth: 95% Line-in: Mute CD Audio: 50% If I turn off the Line-In on my FC4 volume mixer I get rid of the noise but I also lose the sound for my TV tuner (tvtime). The default sound channel for tvtime is 'line'. I have tried changing that to 'pcm' in tvtime.xml to no avail. tvtime gives me the choice of line as: vol, bass, treble, synth, pcm, speaker, line, mic, cd, mix, pcm2,rec, igain, ogain, line1, line2, line3, dig1, dig2, dig3, phin, phout, video, radio, monitor <option name="MixerDevice" value="/dev/mixer:pcm"/> I am relatively new to sound and media configuration, so I am pretty sure that I have picked the wrong device or channel name. Any and all help straightening this out will be gratefully received. By the way, but not the main issue, I am getting vertical interference lines on my TV picture about 1" apart. What are they? Regards Bill