mp3 player that can slow down/speed up songs?

RufusD · 2011-05-25 06:41:58

Hi there!
Is there an mp3 player that allows me to change the speed of the songs? I know that audacity can do this, but I need an on-the-fly solution, I don't want to alter the files on disk.

Any suggestions will be appreciated!
Best wishes,
Rufus

karol · 2011-05-25 06:46:15

Sure, mplayer / mplayer2 can do it.

mplayer -af scaletempo -speed 1.5

or just

mplayer -af scaletempo

if you prefer to start playing at the default speed.
You can speed up / slow down on the fly using '[' and ']' keys.

Last edited by karol (2011-05-25 06:47:49)

RufusD · 2011-05-25 20:39:07

Thanks for the answer! I never knew mplayer could do this. However, this also changes the tuning of the song (as does alsaplayer). I *think* I once heard it's nowadays possible to change the speed without messing with the frequencies. Is this even thinkable?

karol · 2011-05-25 20:54:01

From the mplayer2 manpage

scaletempo[=option1:option2:...]
Scales audio tempo without altering pitch, optionally synced to playback speed (default).
...
speed=<tempo|pitch|both|none>
Set response to speed change.
tempo
Scale tempo in sync with speed (default).
pitch
Reverses effect of filter. Scales pitch without altering tempo. Add '[ speed_mult
0.9438743126816935' and '] speed_mult 1.059463094352953' to your input.conf to step by
musical semi-tones. WARNING: Loses sync with video.
both Scale both tempo and pitch.
none Ignore speed changes.

If you scale tempo

mplayer -af scaletempo=speed=tempo

(it has the same effect as the example in my previous post)
the pitch remains constant, but the song plays faster / slower.
If you scale pitch

mplayer -af scaletempo=speed=pitch

the song will play at the same speed (will have the same duration) but you can change the pitch.

Army · 2011-05-26 08:33:20

Hey cool, I also didn't know mplayer can do this.

karol · 2011-05-26 16:02:09

Army wrote:

Hey cool, I also didn't know mplayer can do this.

Many players can, even sox (play):

play <filename> tempo 1.5

or

play <filename> speed 1.5

If you ♥ chipmunks.

People often run 'mplayer' alone, w/o specifying '-af scaletempo' and when they change the speed of the song, the pitch changes too and that's a bummer in most cases.

hermes · 2011-05-26 21:31:39

Any mplayer based player should do it. I use smplayer: { to scale down and } to scale up.
VLC does it as well.

Army · 2011-05-26 21:54:41

hermes wrote:

Any mplayer based player should do it. I use smplayer: { to scale down and } to scale up.
VLC does it as well.

With [ and ] you'll get smaller steps.

ConnorBehan · 2011-05-27 00:46:22

Sampling a song at a random speed with mplayer was actually the focus of an entire script: https://bbs.archlinux.org/viewtopic.php?id=56646&p=58

karol · 2011-05-27 00:52:06

ConnorBehan wrote:

Sampling a song at a random speed with mplayer was actually the focus of an entire script: https://bbs.archlinux.org/viewtopic.php?id=56646&p=58

Cool :-)
Next time can you please link to the specific post instead of a page? Some of us use non-default setups (I prefer to view 75 posts per page). Thanks :-)

ConnorBehan · 2011-05-27 02:23:58

Oops! It's https://bbs.archlinux.org/viewtopic.php … 52#p895852 but you must remember reading it cause yours is the next post .

jlindgren · 2011-05-27 17:19:44

Audacious has a plugin that does this as well.

karol · 2011-06-12 15:09:53

You might want to try http://www.teuton.org/~gabriel/stretchplayer/ It's available from [archaudio-testing] but don't ask me how to configure it ;P

iFSS · 2011-06-13 13:24:00

Mixxx's time-stretching works extremely well for not altering the pitch.

Arch Linux

#1 2011-05-25 06:41:58

mp3 player that can slow down/speed up songs?

#2 2011-05-25 06:46:15

Re: mp3 player that can slow down/speed up songs?

#3 2011-05-25 20:39:07

Re: mp3 player that can slow down/speed up songs?

#4 2011-05-25 20:54:01

Re: mp3 player that can slow down/speed up songs?

#5 2011-05-26 08:33:20

Re: mp3 player that can slow down/speed up songs?

#6 2011-05-26 16:02:09

Re: mp3 player that can slow down/speed up songs?

#7 2011-05-26 21:31:39

Re: mp3 player that can slow down/speed up songs?

#8 2011-05-26 21:54:41

Re: mp3 player that can slow down/speed up songs?

#9 2011-05-27 00:46:22

Re: mp3 player that can slow down/speed up songs?

#10 2011-05-27 00:52:06

Re: mp3 player that can slow down/speed up songs?

#11 2011-05-27 02:23:58

Re: mp3 player that can slow down/speed up songs?

#12 2011-05-27 17:19:44

Re: mp3 player that can slow down/speed up songs?

#13 2011-06-12 15:09:53

Re: mp3 player that can slow down/speed up songs?

#14 2011-06-13 13:24:00

Re: mp3 player that can slow down/speed up songs?

Board footer