These data were submitted on: Wednesday, June, 9, 2004 at 07:26:37
 
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NAME:  Pierre Vanhoucke

CALL:  ON5GN

E-mail:  pierre.vanhoucke@skynet.be

MOTHERBOARD::  Dell Dimension 8250

CPU Speed::  2.4 Ghz

RAM in MB::  1024 MB

SOUND CARD::  Delta 44

SOUND DRIVER(S)::  Alsa 1.0.4

ADDITIONAL CARD1::  PCI128

VIDEO CARD::  ATI Radeon 7000 / 32Mb

VIDEO DRIVER::  ATI Radeon driver

LINUX DISTRIBUTION::  SUSE 

LINUX VERSION::  9.1

KERNEL VERSION::  2.6.4-54.5

GCC VERSION::  3.3.3

SVGALIB VERSION::  1.9.19

LINRAD VERSION::  Linrad-01.20

Analog section:  WSE RX2500
                 WSE RX10700
                 Expanded Spectrum System / Time Machine


TEXT:

             HOW TO USE ALSA FOR A DELTA44 CARD WITH  LINRAD 01.20 
                   ( DUAL CHANNEL AND SAMPLING  AT 96000 Hz )
                                   19-6-2004

  1. ALSA AND LINRAD.

     Using Alsa-drivers with Linrad has been a hot subject for years. With the
     current Alsa-versions, many popular soundcards as p.e. the Soundblaster
     AudioPCI128 can now succesfully be configured and used with Linrad.

     The  Delta44 card however was an exception.
     During the processing of the Linrad menu option U, the following error
     message was generated:
    
        Internal error 1040 (errno=22)
        routine: set analog_io  file:setad.c
        Call to ioctl failed (SNDCTL_DSP_SPEED) .

      Searching the Linrad archives I discovered that back in 2002 Leif gave a
      hint to solve this problem:
 
         Hint

      The patch was applied to Linrad version 01.20 by adapting the line numbers
      to the actual  version of the setad.c routine.
      After the recompilation of Linrad I was able to go through the menu option "U"
      without the error message, and succesfully configure the Delta 44 card for
      input.

      A further check of the content of par_userint also revealed that the
      sampling speed of the Delta44 card was correctly set at  96000.

      Leif plans to include this patch in Linrad  01.21 .

   2. SETUP  DETAILS OF SVGALIB, ALSA AND LINRAD:

      1. Svgalib 1.9.19  and ATI Radeon 7000 32MB /AGP card:

         There is a known installation problem with 'svgalib_helper.o': 

         see  DF9CY's solution described in the Linrad User Data Bank

         Modify libvga.config with 'mouse PS2' and 'HorizSync 31.5 90'

         Note: there is a minor problem with the ATI Radeon driver: vgatest works OK
         for mode 13 ( 1280x1024, 256 colours), but the background colours of
         /dev/tty1 are not reset to their original, 64K value upon exit.
         ( problem reported to matan@svgalib.org on 17-6-2004 )

      2. The Alsa version that comes with Suse 9.1 is 1.0.4

      3. The soundcards were configured with YAST2:
  
         An AudioPCI128 card was selected as card 0.
         A Delta44 card was selected as card 1.

      4. Linrad is always started in  runlevel 1 to avoid potential
         interferences from other (alsa-related ) processes.

      5. To start Linrad, the following shell was created and  saved as
         /usr/bin/lira:

          #!/bin/bash
       
          # 1. Start Alsa
         
               rcalsasound start

          # 2. Load svgalib_helper
           
               insmod /usr/local/src/svgalib-1.9.19/kernel/svgalib_helper/svgalib_helper.o

          # 3. Set output mixer for PCI128 card

               amixer -c0 sset PCM,0 100% 100% unmute
               amixer -c0 sset Master,0 50% 50%

          # 4. Set input mixer for Delta44

               amixer -c1 cset numid=34 12      #set speed to 96000
               amixer -c1 cset numid=49 32      #set volume adc0 to 25 %
               amixer -c1 cset numid=51 32      #set volume adc1 to 25 %
               amixer -c1 cset numid=53 32      #set volume adc2 to 25 %
               amixer -c1 cset numid=55 32      #set volume adc3 to 25 %

          # 5. Start linrad

               cd /home/pierre/linrad/linrad-01.20
               ./linrad

          # 6. Stop alsa

               rcalsasound stop
               exit


      6. Linrad parameters:

        Initial setup parameters:

        mlockall= N  ( Y freezes the system ! )
        usleep=N
        video mode =13
        fontscale=1
        mouse speed reduction =1

       Menu option "U":

         Following devices are displayed:

          01 /dev/dsp0  (corresponding with the PCI128 card  )
          02 /dev/dsp1  (corresponding with the Delta44 )
          49 /dev/dsp49 (correponding with ??????? )
    
        Select device number for input?:   2

        Open /dev/dsp1 as RDONLY or RDWR (O/W)?:   O

        Select radio interface?:  4

        Select sampling rate?:  96000

        Select device number for output?:  1

        Use close and reopen?: Y

        P.S. The 'max da speed' parameter in par_userint was changed from 192000
             to 8000 with joe.

       Menu option "D":

         Hint: set baseband storage time to 10,  if you want to save buffer storage.

   
         Have fun with Linrad

         73  Pierre /ON5GN

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