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1
General Audio / Downsampling Vinyl-Rips to CD
Last post by FLX90 -
Hello,

I have some 192 kHz / 24 bit Vinyl-Rips in FLAC and want them to downsample to 44.1 kHz / 16 bit for my iPhone.

I would like to do that with FFmpeg + SoX.

So is that line correct?

Code: [Select]
ffmpeg -i input.flac -af aresample=resampler=soxr -acodec alac -ar 44100 -sample_fmt s16p output.m4a

I read about dither with downsampling.
But that is done with SoX by default?

Best regards,
Felix
3
General - (fb2k) / Re: Foobar configuration for hi-res music and USB DAC
Last post by Anakunda -
Review the output devices page in preferences and choose either ASIO or WASAPI for output, that will ensure the signal is send in exclusive mode and not remixed anywhere on the path.
Also make sure you have audio driver installed for your device as without driver you will only be able to play up to 24/96 resolution.
Then review your foobar DSP settings and remove everything unnecessary.
The rest depends on audio signal source you feed and playback hardware (DAC, AMP, speakers, cables)
5
MP3 / Re: best mp3 encoder with something better than a command line interface?
Last post by BrilliantBob -
IMO lame v3.100 is the best .mp3 encoder.

If you want to know what lame.exe really can do, you must recompile the source code with all the dev settings unlocked. Now I realized the .mp3 format is not dead; can be used even for high quality encoding, with the .mp3 file size +7x smaller than the .wav format.

By the way, use some good quality speakers to hear the differences;  my subwoofer make 20 Hz audible signal and the best vibration output is at 34 Hz -3dB.

I made a small bat file to automate the finding of the best scale when I encode with lame.

Code: [Select]
@echo off
@setlocal
color 1E
echo  ÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜ
echo  Ý                                          ÚÄÄÄ¿Þ
echo  Ý         LAME v3.100 64bit unleashed      ³ û ³Þ
echo  Ý                                          ÀÄÄÄÙÞ
echo. ßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßß
echo.

:: highpass filter disabled. polyphase lowpass filter disabled
:: using short blocks if better
:: interchannel masking ratio: 0.0002
:: using joint stereo for better compression
::      for access to dev settings (--help dev) put "#define _ALLOW_INTERNAL_OPTIONS 1" in parse.c and compile
:: default lame psychoacustic tuning:                        --ns-bass -0.5 --ns-alto -0.25 --ns-treble -0.025 --ns-sfb21 0.5
:: adjusted masking (more clear and selective sounds, noise out): bass=-1 dB,    alto=-0.5 dB,   treble=-0.275 dB,  sfb21=0 dB

lame.exe -mj --ns-bass -0.5 --ns-alto -0.25 --ns-treble -0.25 --ns-sfb21 -0.25 --short --verbose -q0 -b320 --cbr -c --resample 48 --highpass 0.001 --lowpass -1 --clipdetect aaa.wav out.mp3 --bitwidth 24 --interch 0.0002 --scale 1.5
ECHO 

:step1
echo -------------------
Set /P _link=new scale:
echo -------------------
lame.exe -mj --ns-bass -0.5 --ns-alto -0.25 --ns-treble -0.25 --ns-sfb21 -0.25 --short --verbose -q0 -b320 --cbr -c --resample 48 --highpass 0.001 --lowpass -1 --clipdetect aaa.wav out.mp3 --bitwidth 24 --interch 0.0002 --scale %_link%
ECHO 

echo ----------------------------
     Set /P _abort=exit? (y, *):
echo ----------------------------
If /i "%_abort%"=="Y" goto step2
If /i "%_abort%"=="y" goto step2
goto step1
:step2
pause
P.S.- Before the .mp3 encoding, I used some wave editor to make sounds better for me.

7
Lossless / Other Codecs / Re: Which is the best lossless codec?
Last post by Porcus -
So what's stopping you?
Apart from two pages trying to get certain users understand that one should first get facts right AND establish consensus over what is important and what is not?

(FWIW, I also agree with @lvqcl that it makes sense to rewrite it.)

But heck, I removed the password feature from TTA pros (and left it in "other"). So, one down. The facts on the rest, anyone?



8
Audio Hardware / Re: Help me build my first serious music (stereo) system
Last post by bdunham7 -
Quote
Currently I have Denon AVR-1613 receiver with Klipsch F-30 tower speakers. To be honest, I do not like the way they sound. I can't really explain it but they sound a little harsh...

OK, so you already have a 'real' system, but you aren't happy with it.  That's actually a good place to start.

So, a bunch more questions:

1) Do you have a carpet in the room?
2) Have you run the Audyssey room correction?
3) If so, do you have the option of viewing the results in a menu (it will look like a sort of rough EQ graph) and
4) Do you use the Audyssey, Audyssey Flat, L/R Bypass or Off settings? (if you have them)
5) To the extent you can tell, is the harshness in the upper-midbass region 150-250 Hz or midrange 1-2Khz?  Or elsewhere?
6) Does it change if you get up and walk around, sit on the floor, etc?
7) Lastly (for today), how old are you and do you have any hearing problems (tinnitus, etc) or are you exposed to loud noise?

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