Re: MD: FM 15khz pilot tone
Actually, for analog FM stereo, it's 19KHz (+ or - 2 Hz) at 10% or less modulation. Also, the lower sideband of the L-R stereo subchannel extends downwards from it's center at 38 KHz towards 19KHz, so you may also be getting alias components from the extreme high end of the subchannel if the lowpass filter in your tuner is not working properly. To bad MD doesn't have an optional 32 KHz sample rate; if it did, the anti-alias filter in the recorder would for sure eliminate the 19KHz pilot subcarrier... Some modern tuners use a 19KHz cancellation by adding in a 19 KHz signal 180 degrees out-of- phase at exactly the right level. Of course they still need a low pass filter after that to take out the alias from the stereo subchannel. The cancellation method just further reduces the level of the continuous 19 KHz signal... US analog TV stereo uses a similar scheme, using the horizontal frequency (a little less than 15750 Hz) for the pilot and 2X that for the stereo subchannel center. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: FM 15khz pilot tone
On Mon, 12 Feb 2001 18:54:27 -0600, John Small [EMAIL PROTECTED] wrote: How to get it out? I mean, how to filter it out when recording initially? -jts Arlington, TX - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
RE: MD: FM 15khz pilot tone
15kHz notch filter ... best done by either having an in-line filter while recording (if done in analogue), or using a PC based filter (like the one in Cooledit Pro) after having copied the entire sound source to a WAV file on your PC. Adios, LarZ --- TAMA - The Strongest Name in Drums --- -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of John Small Sent: Tuesday, 13 February 2001 11:54 To: [EMAIL PROTECTED] Subject:MD: FM 15khz pilot tone Recording on a JB940. I thought I'd read about filtering out the pilot tone from the FM carrier, but in re-reading the manual I find nothing. It's definately there in a program I recorded today. How to get it out? Thanks. -jts Arlington, TX - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED] - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
