Reply
 
Thread Tools Display Modes
  #1   Report Post  
Posted to rec.audio.pro
Tobiah Tobiah is offline
external usenet poster
 
Posts: 666
Default [OT] Odd speed fluctuation when streaming to car

Android phone plays Spotify over bluetooth into car stereo.
Particularly soon after starting play, I get what sounds like
speed changes as though someone has their finger on an LP.
After a while it smooths out. I'm getting maybe a couple
of hundred cents variation, just as a guess.

I was curious as to who was responsible. I haven't tested
with another device but I suspect the 2017 Hyundai.


  #2   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

Tobiah wrote: "Android phone plays Spotify over bluetooth into car stereo.
Particularly soon after starting play, I get what sounds like
speed changes as though someone has their finger on an LP.
After a while it smooths out. I'm getting maybe a couple
of hundred cents variation, just as a guess.

I was curious as to who was responsible. I haven't tested
with another device but I suspect the 2017 Hyundai. "


You're just imagining things.






PSYCH - Just kidding! I noticed that also, via the
Blue Tooth in a 2013 Sonata LTD I drove some
years ago. The first 30 or sec. the speed was just
a tad too high - like a 33 1/3 record at 34rpm - then
returned to normal. This from the company that
totally fubared their first US models with electric
power steering: things were all over the road!!

Don't count on much help here with it, though.
  #3   Report Post  
Posted to rec.audio.pro
Tobiah Tobiah is offline
external usenet poster
 
Posts: 666
Default [OT] Odd speed fluctuation when streaming to car


I'm getting maybe a couple
of hundred cents variation, just as a guess.


I meant a fraction of a half-step, like 10 or 20 cents.


  #4   Report Post  
Posted to rec.audio.pro
Tobiah Tobiah is offline
external usenet poster
 
Posts: 666
Default [OT] Odd speed fluctuation when streaming to car

Don't count on much help here with it, though.

No help required; id est, quid id est.

I just thought it might create some interesting discussion
as this group gasps its last.
  #5   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

Tobiah wrote: "id est, quid id est. "


PUSSY statement! NOTHING of human creation or decree
"is what it is".

If humans made/did it, it can be changed/fixed/
eradicated, whatever.

Nothing personal, I just think it's a signal of resignation
when someone says that.

I did bring up this temporary Bluetooth speed playback
issue on an automotive forum, and all it got were
crickets - even two years hence, and I no longer drive
that car.


  #7   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

John Williamson wrote: "
The correct solution is to apply test equipment to find out where the
variation in clock speed on playback is occurring, and fix that.

The problem is unlikely to be caused by the bluetooth connection, unless
the bluetooth clock is locked to the playback clock, which on cheap gear
can happen if they use the same crystal for timing both.

--
Tciao for Now!

John. "

The problem is, we both heard this speed up via the
Blue Tooth in these Hyundais. And it lasted under one
minute, for me anyway. I never experienced it with
any other Blue Tooth scenario, IE, a BT speaker in
a store. And via hardwire - playback speed was always
correct, in the cars, and anywhere else.

So what else could explain it?
  #9   Report Post  
Posted to rec.audio.pro
None None is offline
external usenet poster
 
Posts: 106
Default [OT] Odd speed fluctuation when streaming to car

Theckhhhmaaash gibberered:

I did bring up this temporary Bluetooth speed playback
issue on an automotive forum, and all it got were
crickets - even two years hence


Your vapid gibbering was ignored, and two years later, you're
still butt-hurt and whining about it. Thats ****ing retarded,
li'l buddy. HTH. LKINHSF.

  #10   Report Post  
Posted to rec.audio.pro
None None is offline
external usenet poster
 
Posts: 106
Default [OT] Odd speed fluctuation when streaming to car

"John Williamson" wrote in message ...
By the way, your newsreader seems to be broken, hiding your response after
the sig seperator.


It may be dumb **** operator error.



  #12   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

John Williamson wrote: "That is what the test equipment is for. No need to speculate, it will
tell you. "

Two people on this thread experienced the same speedup
of playback via Blue Tooth, in the same make of car with
the Blue Tooth feature. They experienced it nowhere else.

Nobody is speculating. Are you suggesting we are both
lying about our experiences?
  #15   Report Post  
Posted to rec.audio.pro
None None is offline
external usenet poster
 
Posts: 106
Default [OT] Odd speed fluctuation when streaming to car

theckmah @ dumb****.shortbus.edu gibbered:
Nobody is speculating.


You are speculating.

Are you suggesting we are both lying about our experiences?


Nobody's suggesting that you're lying. You're just a retarded idiot whining
about something you're too stupid to comprehend. Short-bus dumb ****.

HADH. SJF. FCKWAFA!



  #16   Report Post  
Posted to rec.audio.pro
[email protected] makolber@yahoo.com is offline
external usenet poster
 
Posts: 614
Default [OT] Odd speed fluctuation when streaming to car

there is some interesting technical data here

https://www.eetimes.com/document.asp?doc_id=1277103


I wonder if the system was not well designed for VBR MP3 files.

Can you try to compare the results using VBR vs CBR MP3 files?

mark
  #17   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

mako wrote: "I wonder if the system was not well designed for VBR MP3 files.

Can you try to compare the results using VBR vs CBR MP3 files? "

Great suggestion! If Tobiah still owns his car with BT enabled
stereo he should try that.


I noticed that too, when playing CDs with mp3 files on a CD player
that can play those disks, occasionally it has a hard time with VBR
files. Remember, CD players are looking for a sampling rate to
control their inner clock so the disc plays back at the correct speed -
without stuttering or pitch/tempo changes/Mickey Mouse effect, etc.

We all know that value - 44.1kHz. That's precisely 44,100 Hertz, not
44,099 or 44,100.3. Sometimes, even on a newer CD player that
can play back mp3s off a disc, something other than desired, is
heard. !
  #18   Report Post  
Posted to rec.audio.pro
None None is offline
external usenet poster
 
Posts: 106
Default [OT] Odd speed fluctuation when streaming to car

Thechhhmaaaah ( tardsRtheckmah @ dum****.shortbus.edu ) kook-gibbered:

We all know that value - 44.1kHz. That's precisely 44,100 Hertz, not

44,099 or 44,100.3.

A sample rate of 44100.3 hertz is within specs for most consumer-grade CD
players. Numbers are never your friend, li'l buddy, especially when you're
just pulling them out of your bung-hole to pretend that you understand.
SBDF.

  #20   Report Post  
Posted to rec.audio.pro
[email protected] makolber@yahoo.com is offline
external usenet poster
 
Posts: 614
Default [OT] Odd speed fluctuation when streaming to car

On Tuesday, July 17, 2018 at 10:31:41 AM UTC-4, wrote:
mako wrote: "I wonder if the system was not well designed for VBR MP3 files.

Can you try to compare the results using VBR vs CBR MP3 files? "

Great suggestion! If Tobiah still owns his car with BT enabled
stereo he should try that.


I noticed that too, when playing CDs with mp3 files on a CD player
that can play those disks, occasionally it has a hard time with VBR
files. Remember, CD players are looking for a sampling rate to
control their inner clock so the disc plays back at the correct speed -
without stuttering or pitch/tempo changes/Mickey Mouse effect, etc.

We all know that value - 44.1kHz. That's precisely 44,100 Hertz, not
44,099 or 44,100.3. Sometimes, even on a newer CD player that
can play back mp3s off a disc, something other than desired, is
heard. !


VBR and CBR refer to the MP3 data bit rate.
The audio sample rate is always (supposed to be anyway) constant.
m




  #21   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

mako wrote: "VBR and CBR refer to the MP3 data bit rate."
I, and my cats, all know that.

"The audio sample rate is always (supposed to be anyway) constant.
m "
Perhaps the machine playing discs with VBR mp3 is confusing which
ahould be constant and which is variable.

  #22   Report Post  
Posted to rec.audio.pro
John Williamson John Williamson is offline
external usenet poster
 
Posts: 1,753
Default [OT] Odd speed fluctuation when streaming to car

On 18/07/2018 14:11, wrote:
"
Perhaps the machine playing discs with VBR mp3 is confusing which
ahould be constant and which is variable.


if the machine playing back the mp3 gets confused, it just rejects the
file. Playing back a VBR file using the CBR algorithm or vice versa just
outputs garbage, not a change in speed.

There is some info on the file structure he-

https://en.wikipedia.org/wiki/MP3#File_structure

MP3 files consist of "frames" which have information encoded in them to
reconstruct (more or less) a section of the original waveform. The
frames are all timecoded, and the player outputs the reconstruction of
the encoded waveform held in the data blocks using a fixed clock rate
specified in the file header.

In fact, read the whole article, and you will know a lot more than you
want to know about mp3 playback and encoding.

--
Tciao for Now!

John.
  #23   Report Post  
Posted to rec.audio.pro
[email protected] thekmanrocks@gmail.com is offline
external usenet poster
 
Posts: 1,742
Default [OT] Odd speed fluctuation when streaming to car

John Williamson:

This is what happened one time when playing VBR MP3
on a compatible player:

"I Pledge Alleg - the flag of the Unit - tes of America,
and - public for which it stands, one - under God,
Indivisible with lib - ustice, for all"

Like it was skipping chunks.

So I re-encoded to CBR, problem solved!
  #26   Report Post  
Posted to rec.audio.pro
jason jason is offline
external usenet poster
 
Posts: 10
Default [OT] Odd speed fluctuation when streaming to car

In article ,
says...
The error correction introduces a delay in the chain from laser to DAC
input.
This is why the electronics has a buffer,

That would prevent what I guessed might be the problem...
Reply
Thread Tools
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yamaha RX-V750 + OTA television signal = volume fluctuation djh Tech 5 March 11th 13 02:35 AM
streaming mp3 Jack Jarmush Tech 2 January 29th 05 04:00 PM
USB streaming hi-fi's Richard Blackwood General 12 January 24th 05 05:56 PM
Streaming Audio? Lance Pro Audio 0 May 19th 04 04:29 PM
RAM speed, Bus speed, HD speed, Cache for laptops???? Envirokind Pro Audio 0 February 22nd 04 11:47 AM


All times are GMT +1. The time now is 06:07 PM.

Powered by: vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AudioBanter.com.
The comments are property of their posters.
 

About Us

"It's about Audio and hi-fi"