Re: [MP3 ENCODER] filter options (and several questions)

1999-12-19 Thread Gabriel Bouvigne
It's right that it's not a lot, but I think it's important. As an example, a standard 10 or 15Hz high pass filter would be nice, as no one is able to ear such frequencies, so why encoding them? A 10kHz filter, IMHO, would be a bad idea. Even in poor listening conditions with less than

Re: [MP3 ENCODER] filter options (and several questions)

1999-12-17 Thread Gabriel Bouvigne
What is the purpose of this high-pass filtering ? You said that it would affect only 2 MDCT coeficients, that is less than a percent of them all, so what gain do you/we expect from it ? In the tuning of the 44.1kHz voice option (I know that this option should be updated now for other

Re: [MP3 ENCODER] filter options (and several questions)

1999-12-17 Thread John T. Larkin
On Thu, Dec 16, 1999 at 08:06:26PM +0100, Gabriel Bouvigne ([EMAIL PROTECTED]) wrote ... It's right that it's not a lot, but I think it's important. As an example, a standard 10 or 15Hz high pass filter would be nice, as no one is able to ear such frequencies, so why encoding them? A 10kHz

Re: [MP3 ENCODER] filter options (and several questions)

1999-12-16 Thread Mark Taylor
Date: Wed, 15 Dec 1999 23:20:03 -0800 From: Monty [EMAIL PROTECTED] a frequency resolution of only 22050/576 = 38Hz. So the accuracy of the first few coefficients is questionable, and a highpass filter at 50Hz would only effect the first 2 MDCT coefficients. I dont know how big a

Re: [MP3 ENCODER] filter options (and several questions)

1999-12-14 Thread John Hayward-Warburton
Robert Hegemann wrote: Thank you Ross for the info about radio frequencies. Coding FM quality with sharp cutoff would look like: lame --highpass 0.05 --highpass-width 0 ...etc May I make a case for --highpass 0.016 ? FM Radio usually goes down a bit lower than 50Hz. The lowest note on a