android
  #1  
Old 04-15-2008, 05:09 AM
Nekka Nekka is offline
Junior Member
 
Join Date: Feb 2008
Posts: 1
Default Stereo Sound via Bluetooth

Good day!

I own YP-P2 (4.05b firmware) and SonyErricson HBH-DS220 stereo bluetooth garniture.

Both supports Bluetooth 2.0

When listening music, i'm hearing nice at all sound, but with noise at high frequincy.. like they are ripped. When using the same phones w/o bluetooth - everything is fine.

At one hand we have: non-compressed sound needs 1378 KBit/sec (44100 * 2 (16bit) * 2 (Stereo) / 1024 (KBytes) * 8 (KBits))
but Bluetooth 2.0 allows only ~710 KBit/sec.

But in other hand, Bluetooth 2.0 has EDR with allows 2.1 MBits bandwith, and A2DP supports SBC codec.

So, where's the problem? in P2 or in SE garniture or in Bluetooth technology?

Thanks :>
Reply With Quote

Advertisement [Remove Advertisement]

  #2  
Old 04-18-2008, 07:40 AM
pgh1969pa pgh1969pa is offline
Senior Member
 
Join Date: Jul 2007
Posts: 578
Default

Bluetooth A2DP stream quality varies greatly based on chipsets, hardware, and firmware. Some headphone/device pairings sound good and some sound terrible. It's not always a headphone or device problem alone.

Generally speaking, the BT specifications mean little. Often, OEMs limit bit rates well below theoretical capabilities to enhance battery life or device performance so quoting bandwidth is pointless. I've found that out quickly with a couple of BT 2.0 A2DP mobile phones that I hacked to higher bit rates than the OEM enabled. Get over the specs and focus the actual hardware/software/firmware performance. The T9B has BT 1.2 and has better A2DP output than it's BT 2.0 replacement, the T10. At least this is with every BT headphone I've tested (BT 1.2 & 2.0).
Reply With Quote

  #3  
Old 04-18-2008, 10:12 AM
paloverde's Avatar
paloverde paloverde is offline
Junior Member
 
Join Date: Mar 2008
Posts: 25
Default

also some devices like my samsung mobile i450 music phone actually stream bluetooth with equalizer choices! But the P2 does not stream equalizer settings via bluetooth, hope they work on that via firmware.
Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

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

Forum Jump



All times are GMT -5. The time now is 07:22 PM.