Skip to main content

Topic: MP3 CBR320 21.8kHz Lowpass?! (Read 2854 times) previous topic - next topic

0 Members and 1 Guest are viewing this topic.
MP3 CBR320 21.8kHz Lowpass?!
What is this mp3 encoder?
for disable lowpass in LAME3.99.5 CBR320 i use --lowpass -1, but in 3.99.5 it is impossible to create a lowpass in this frequency region (21.8kHz)
On Soundcloud streaming this tracks is very clean. Of course the clean depends on how it was worked, but when you have a bad encoder, the music, however clean it may be, can be sweating muffled.

Help me to find this encoder!

Thx!
  • Last Edit: 13 July, 2017, 06:40:54 AM by Mateus Reis

  • KozmoNaut
  • [*][*][*][*][*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #1
Why do you want to disable the lowpass filter? It's there for a reason, you know. Namely increasing the efficiency of the encoder for audible frequencies.

  • pdq
  • [*][*][*][*][*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #2
Even if you set a high enough lowpass filter, a good encoder still won't encode sounds that it considers to be inaudible or masked, which is pretty much anything over 20 kHz.

  • Deathcrow
  • [*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #3
The big question as always: Are you looking for a (inefficient) way to encode pictures of spectrograms or are you interested in the best sound for your audio codec of choice?

  • Leo 69
  • [*][*][*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #4
Every single reply in this thread can be considered off topic. The question from TS is "What is this mp3 encoder?"
However everyone starts to show what a smart ass he is.

  • saratoga
  • [*][*][*][*][*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #5
Every single reply in this thread can be considered off topic. The question from TS is "What is this mp3 encoder?"


No one can tell him that from a spectrogram, so his question cannot be answered.

It is also not off topic to point out that he should not be trying to adjust low pass filtering settings.

  • shadowking
  • [*][*][*][*][*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #6
Disabled lowpass is useless since mp3 CBR doesn't usually encode above 16khz with precision (see -Y switch).  Its also not always the best since a difficult sample (noise) can be worse as HF noise may be amplified. For HQ HF encoding I would not use mp3  (assuming you can hear that high in music and it really is an issue).
wavpack 4.8 -b4x4s0.75c

  • pdq
  • [*][*][*][*][*]
Re: MP3 CBR320 21.8kHz Lowpass?!
Reply #7
If one wanted to retain the higher frequencies (which I do not recommend), would resampling to 48 kHz and then encoding work?