FAQ: [#6895] Can not hear sound from LFE channel during multichannel test in ad1836(2011)

Document created by Aaronwu Employee on Sep 12, 2013
Version 1Show Document
  • View in full screen mode

[#6895] Can not hear sound from LFE channel during multichannel test in ad1836

Submitted By: Vivi Li

Open Date

2011-11-22 04:40:09     Close Date

2011-12-14 02:54:15

Priority:

Medium     Assignee:

Lars-Peter Clausen

Status:

Closed     Fixed In Release:

N/A

Found In Release:

2011R1     Release:

Category:

N/A     Board:

N/A

Processor:

ALL     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Rejected

Uboot version or rev.:

    Toolchain version or rev.:

gcc4.3-2011R1-RC2

App binary format:

N/A     

Summary: Can not hear sound from LFE channel during multichannel test in ad1836

Details:

 

Can not hear sound from LFE channel during multichannel test in ad1836.

For ad1938, I can hear sound from all eight channels.

 

Bellow is the mapping of mini-jack connectors to multichannel:

--

Green: Front Left / Right

Yellow: Center / LFE

Black: Rear Left / Right

--

 

--

root:/> version

kernel:    Linux release 2.6.34.7-ADI-2010R1-svn9504, build #36 Sun Nov 21 05:02:32 CST 2010

toolchain: bfin-linux-uclibc-gcc release gcc version 4.3.5 (ADI-2010R1-RC4)

user-dist: release svn-9963, build #756 Sun Nov 21 05:00:18 CST 2010

root:/>

root:/> speaker-test -c 6

 

speaker-test 1.0.12

 

Playback device is default

Stream parameters are 48000Hz, S16_LE, 6 channels

Using 16 octaves of pink noise

Rate set to 48000Hz (requested 48000Hz)

Buffer size range from 342 to 1365

Period size range from 171 to 682

Using max buffer size 1364

Periods = 4

was set period_size = 341

was set buffer_size = 1364

0 - Front Left

4 - Center

1 - Front Right

3 - Rear Right

2 - Rear Left

5 - LFE

Time per period = 17.963659

0 - Front Left

^C

--

 

Follow-ups

 

--- Lars-Peter Clausen                                       2011-11-25 07:30:39

Hi,

 

I can't reproduce your problem with my setup. I get noise on all 6 channels.

 

--- Vivi Li                                                  2011-12-14 02:21:53

Hi, Lars

 

What's your hardware configuration for AD1836 add-on board? Mine is as bellow:

--

J1: 1&2 on;

J9: 3&5 on, 4&6 on;

J10:1&3 on, 2&4 on;

J11:1&3 on, 2&4 on;

J12:3&5 on, 4&6 on;

J5: PF4;

--

 

And for BF537-STAMP, is there any hardware config I should concern about?

 

--- Vivi Li                                                  2011-12-14 03:14:07

It turns out that ad1836 that I use has hardware problem.

So it's not a bug.

Close it.

 

 

 

    Files

    Changes

    Commits

    Dependencies

    Duplicates

    Associations

    Tags

 

File Name     File Type     File Size     Posted By

config.config.multichannel    application/octet-stream    51878    Vivi Li

config.linux.multichannel    application/octet-stream    36306    Vivi Li

Outcomes