soundmodem

soundmodem

[folkert]

Hi,

I'm having a bit of trouble to get a soundmodem working.
The problem is that the radio only transmits silence. So PTT works.
I tried with and without a line-level-to-mic-level resistor network, I
also tried that line-level-thingy together with a capacitor to solve the
problem of the couple-of-volts on the mic-pins of the radio, but always
silence. I verified that audio comes out of the soundcard and also out
of the resistors (something like:
http://www.hometheatershack.com/forums/attachments/spl-meters-mics-calibration-sound-cards/11906d1232997532-ecm8000-microphone-measuring-techniques-usage-discussion-line-mic-pad.jpg
).
Any ideas?


Folkert van Heusden

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Re: soundmodem

[David Ranch]

Hello Folkert,

While Soundmodem is the old standby software TNC for LInux, there are 
better solutions out there now.  The one I've been recommending with 
significantly better decodes is a new entry called Dire Wolf from WB2OSZ:

    http://home.comcast.net/~wb2osz/site/

If you download the new beta source archive ( 
http://home.comcast.net/~wb2osz/Version%201.0/direwolf-1.0-src.zip ), 
open up the zip, look in the User-Guide and check out Chapter 10.  In 
there, it gives a table of Dire wolf's # of decodes compared to all 
kinds of TNCs including Soundmodem and safe to say, it blows away 
Soundmodem due to it's multiple off frequency decoders, multi-bit error 
correction, etc..  There is also a version for the Raspberry Pi as well!

Back to your original problem, I suspect your issue is in the Linux 
sound system.  Are you using PulseAudio?   Did you run pavucontrol and 
route the audio from Soundmodem to your desired soundcard?

--David
KI6ZHD

Re: soundmodem

[folkert]

> Back to your original problem, I suspect your issue is in the Linux
> sound system.  Are you using PulseAudio?   Did you run pavucontrol
> and route the audio from Soundmodem to your desired soundcard?

I don't think that is the problem: I connected headphones on the
audio-out connector of the soundcard and did hear the modem-noise. So
encoded data is going out. I'm suspecting something electrical going
wrong. I googled for it and no special precautions were suggested
anywher, only sdchematics for a ptt were to be found.

Regarding dire wolf: I'll give it a try when the audio tx problem has
been solved.


thanks for your reply

Folkert van Heusden

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Re: soundmodem

[Charles Boling]

It certainly sounds like you've proven that it's a radio-electronics
problem and not on the computer side of things.  The radio you're
using...uses a standard ~600ohm mic, or something else?  Have you ever
used that particular radio with another mic, computer, or other thing
that plugs into the mic jack?  I lack experience in that area, but I'm
just wondering if uses some kind of funky mic or odd way of connecting
it (e.g. the mic doesn't go between "mic" and "gnd" or something). Maybe
measure the native mic's output to make sure it's where-and-what you
expect, or double-check a tech manual for the rig?

Re: soundmodem

[Apostolos Kefalas]

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Sounds like a wrong pin connection. Which radio are you using?

Also check for broken cable or connector on radio side.



On Πεμ, 2014-02-27 at 18:37 +0100, folkert wrote:
> > Back to your original problem, I suspect your issue is in the Linux
> > sound system.  Are you using PulseAudio?   Did you run pavucontrol
> > and route the audio from Soundmodem to your desired soundcard?
> 
> I don't think that is the problem: I connected headphones on the
> audio-out connector of the soundcard and did hear the modem-noise. So
> encoded data is going out. I'm suspecting something electrical going
> wrong. I googled for it and no special precautions were suggested
> anywher, only sdchematics for a ptt were to be found.
> 
> Regarding dire wolf: I'll give it a try when the audio tx problem has
> been solved.
> 
> 
> thanks for your reply
> 
> Folkert van Heusden
> 

-- 
Apostolos Kefalas <sv1ljj@raag.org>

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

Re: soundmodem

[folkert]

> > I'm having a bit of trouble to get a soundmodem working.
> > The problem is that the radio only transmits silence. So PTT works.

David:
> What kind of radio are you using and what pins are you connecting to
> on
> that radio?  Have you tried cranking UP the volume and see if things
> are
> actually way too low?

The radio is a CB radio (do not have my license yet), a DNT Formel 1
(Formule 1).

If tried both a very loud and a very almost silent volume, nothing to
be heard on the receiver. The receiver is located 15 meters away, behind
a couple of floors. An couple of other radio/modem combinations work
fine and can be hear on that other radio.

Charles:
> It certainly sounds like you've proven that it's a radio-electronics
> problem and not on the computer side of things.  The radio you're
> using...uses a standard ~600ohm mic, or something else?  Have you ever
> used that particular radio with another mic, computer, or other thing
> that plugs into the mic jack?  I lack experience in that area, but I'm
> just wondering if uses some kind of funky mic or odd way of connecting
> it (e.g. the mic doesn't go between "mic" and "gnd" or something).
> Maybe
> measure the native mic's output to make sure it's where-and-what you
> expect, or double-check a tech manual for the rig?

I'm also a bit more of a software guy than a hardware guy (trying to
adapt that).
The schematics are:
http://elektrotanya.com/PREVIEWS/45612216/23432455/transceiver/egyeb/dnt_formel_1.pdf_1.png

Apostolos:
> Sounds like a wrong pin connection. Which radio are you using?
> Also check for broken cable or connector on radio side.

I'll do some measuring next saturday to be sure.

Unfortunately the microphone got destroyed (and thrown away) during
adaption to the modem-connector-print.


Folkert van Heusden

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Re: soundmodem

[Charles Boling]

> http://elektrotanya.com/PREVIEWS/45612216/23432455/transceiver/egyeb/dnt_formel_1.pdf_1.png

So, just to double-check what you've done, here's what I see as pin
assignments:

1 GND
2 (not shown)
3 PTT-Tx (Ground it to transmit)
4 MIC audio in (always on, other wire to Ground)
5 PTT-Rx (Ground it to receive)
6 GND (not used in original mic)

The PTT button is working as a SPDT switch.  I don't know how you're
switching, and I didn't look closely at the schematic, but you may not
want RX & TX grounded at the same time; if you're keeping RX on
full-time and doing a SPST switch on TX, you might try disconnecting the
RX to see if your TX audio comes in.

Re: soundmodem

[Larry Levesque]

Sounds like you need to switch you radio to the correct mode.

I am guessing it is a Yaesu and you have it set for Packet/data which 
wants to use the data jack on the back.

Try switching it to a standard mode and use the mic jack or use the data 
jack for the data modes.


On 02/27/2014 11:33 AM, folkert wrote:
> Hi,
>
> I'm having a bit of trouble to get a soundmodem working.
> The problem is that the radio only transmits silence. So PTT works.
> I tried with and without a line-level-to-mic-level resistor network, I
> also tried that line-level-thingy together with a capacitor to solve the
> problem of the couple-of-volts on the mic-pins of the radio, but always
> silence. I verified that audio comes out of the soundcard and also out
> of the resistors (something like:
> http://www.hometheatershack.com/forums/attachments/spl-meters-mics-calibration-sound-cards/11906d1232997532-ecm8000-microphone-measuring-techniques-usage-discussion-line-mic-pad.jpg
> ).
> Any ideas?
>
>
> Folkert van Heusden
>

Re: soundmodem

[folkert]

> > http://elektrotanya.com/PREVIEWS/45612216/23432455/transceiver/egyeb/dnt_formel_1.pdf_1.png
> So, just to double-check what you've done, here's what I see as pin
> assignments:
> 
> 1 GND
> 2 (not shown)
> 3 PTT-Tx (Ground it to transmit)
> 4 MIC audio in (always on, other wire to Ground)
> 5 PTT-Rx (Ground it to receive)
> 6 GND (not used in original mic)



> The PTT button is working as a SPDT switch.  I don't know how you're
> switching, and I didn't look closely at the schematic, but you may not
> want RX & TX grounded at the same time; if you're keeping RX on
> full-time and doing a SPST switch on TX, you might try disconnecting the
> RX to see if your TX audio comes in.

Tried that this night (disconnecting rx) but still silence.

Hmmm, let me see if it helps if I short rx when sending.


Folkert van Heusden

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Re: Soundmodem

[Bob Nielsen]

On Fri, Oct 29, 2004 at 11:59:38AM -0300, Rodolfo Brasnarof wrote:
> On Fri, 29 Oct 2004 16:17:26 +0200
> iw2esa <anespo1@virgilio.it> wrote:
> 
> > Hello,
> > I've a little trouble using the ax25 soundmodem. Here is my
> > conditions:
> > 
> > Slackware 9.1
> > Kernel 2.4.22 with ax25 e soundmodem modules compiled
> 
> First of all. Are you using kernel soundmodem, or userspace soundmodem?
> With userspace soundmodem you do not need soundmodem modules.

It sounds like he is trying to use the soundmodem modules.  I believe 
that it is necessary to remove the audio sound modules when doing this 
in order to avoid a conflict.

Usermode soundmodem is probably preferable in any case.

> 
> > Soundcard integrated in a MB Asus I810
> > 
> > This is the output at boot:
> > =================================================
> > Intel 810 + AC97 Audio, version 0.24, 17:25:27 Oct 24 2004
> > i810: SiS 7012 found at IO 0xb000 and 0xac00, MEM 0x0000 and 0x0000,
> > IRQ 18 i810_audio: Audio Controller supports 6 channels.
> > i810_audio: Defaulting to base 2 channel mode.
> > i810_audio: Resetting connection 0
> > ac97_codec: AC97 Audio codec, id: ALG16 (ALC200/200P)
> > i810_audio: AC'97 codec 0 supports AMAP, total channels = 2
> > es1371: version v0.32 time 17:25:30 Oct 24 2004
> > AX.25: Z8530 SCC driver version 3.0.dl1bke
> > mkiss: AX.25 Multikiss, Hans Albas PE1AYX
> > AX.25: 6pack driver, Revision: 0.3.0 (dynamic channels, max=31)
> > AX.25: bpqether driver version 004
> > baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA
> > baycom_ser_fdx: version 0.10 compiled 17:25:06 Oct 24 2004
> > hdlcdrv: (C) 1996-2000 Thomas Sailer HB9JNX/AE4WA
> > hdlcdrv: version 0.8 compiled 17:25:07 Oct 24 2004
> > baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA
> > baycom_ser_hdx: version 0.10 compiled 17:25:07 Oct 24 2004
> > usb.c: registered new driver hub
> > host/uhci.c: USB Universal Host Controller Interface driver v1.1
> > Initializing USB Mass Storage driver...
> > usb.c: registered new driver usb-storage
> > USB Mass Storage support registered.
> > NET4: Linux TCP/IP 1.0 for NET4.0
> > IP Protocols: ICMP, UDP, TCP, IGMP
> > IP: routing cache hash table of 4096 buckets, 32Kbytes
> > TCP: Hash tables configured (established 32768 bind 32768)
> > IPv4 over IPv4 tunneling driver
> > NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
> > G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4
> > F6FBB/G4KLX ROSE for Linux. Version 0.64 for AX25.037 Linux 2.4
> > NET4: G4KLX/GW4PTS AX.25 for Linux. Version 0.37 for Linux NET4.0
> > kissparms uses obsolete (PF_INET,SOCK_PACKET)
> > xfbbd uses old SIOCAX25GETINFO
> > ============================================
> > 
> > The soundcard works well and I listen the system sounds of kde or
> > music, but is impossible to work in soundmodem. Here is the errors:
> > 
> > Running soundmodem
> > ===============
> > soundmodem: error while loading shared libraries: libxml.so.1: cannot
> > open shared object file: No such file or directory
> 
> This is a known problem. This package is missing in Slackware
> 9.1. Get if from Slackware 8.1 cd or mirror, install it, and
> that's it.
> 
> Anyway, I've seen some problems with the soundmodem package built in
> Slack 9.1. If you have some problems, try compiling it yourself, or I
> can send you a binary file that works fine (at least for me).

Re: Soundmodem

[Tomi Manninen]

On Fri, 2004-10-29 at 17:17, iw2esa wrote:

> Running gmfsk
> ===============
>  gmfsk
> audio_alsa: no cards found!

Something wrong with the ALSA config. You said that playing music
works but maybe the OSS emulation layer is not working properly.
Your music player might be using ALSA directly. gMFSK uses the
OSS sound API and thus needs the ALSA OSS emulation layer to
work.

> ** (gmfsk:6084): WARNING **: FIXME: guard from double entry

Hmm.. I guess this is from the threading libs, I don't think
gMFSK has this error message. :)

Anyway it's probably a result from the audio not working and
as such not serious (?)

-- 
Tomi Manninen / OH2BNS / KP20ME04

Re: Soundmodem

[Rodolfo Brasnarof]

On Fri, 29 Oct 2004 16:17:26 +0200
iw2esa <anespo1@virgilio.it> wrote:

> Hello,
> I've a little trouble using the ax25 soundmodem. Here is my
> conditions:
> 
> Slackware 9.1
> Kernel 2.4.22 with ax25 e soundmodem modules compiled

First of all. Are you using kernel soundmodem, or userspace soundmodem?
With userspace soundmodem you do not need soundmodem modules.

> Soundcard integrated in a MB Asus I810
> 
> This is the output at boot:
> =================================================
> Intel 810 + AC97 Audio, version 0.24, 17:25:27 Oct 24 2004
> i810: SiS 7012 found at IO 0xb000 and 0xac00, MEM 0x0000 and 0x0000,
> IRQ 18 i810_audio: Audio Controller supports 6 channels.
> i810_audio: Defaulting to base 2 channel mode.
> i810_audio: Resetting connection 0
> ac97_codec: AC97 Audio codec, id: ALG16 (ALC200/200P)
> i810_audio: AC'97 codec 0 supports AMAP, total channels = 2
> es1371: version v0.32 time 17:25:30 Oct 24 2004
> AX.25: Z8530 SCC driver version 3.0.dl1bke
> mkiss: AX.25 Multikiss, Hans Albas PE1AYX
> AX.25: 6pack driver, Revision: 0.3.0 (dynamic channels, max=31)
> AX.25: bpqether driver version 004
> baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA
> baycom_ser_fdx: version 0.10 compiled 17:25:06 Oct 24 2004
> hdlcdrv: (C) 1996-2000 Thomas Sailer HB9JNX/AE4WA
> hdlcdrv: version 0.8 compiled 17:25:07 Oct 24 2004
> baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA
> baycom_ser_hdx: version 0.10 compiled 17:25:07 Oct 24 2004
> usb.c: registered new driver hub
> host/uhci.c: USB Universal Host Controller Interface driver v1.1
> Initializing USB Mass Storage driver...
> usb.c: registered new driver usb-storage
> USB Mass Storage support registered.
> NET4: Linux TCP/IP 1.0 for NET4.0
> IP Protocols: ICMP, UDP, TCP, IGMP
> IP: routing cache hash table of 4096 buckets, 32Kbytes
> TCP: Hash tables configured (established 32768 bind 32768)
> IPv4 over IPv4 tunneling driver
> NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
> G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4
> F6FBB/G4KLX ROSE for Linux. Version 0.64 for AX25.037 Linux 2.4
> NET4: G4KLX/GW4PTS AX.25 for Linux. Version 0.37 for Linux NET4.0
> kissparms uses obsolete (PF_INET,SOCK_PACKET)
> xfbbd uses old SIOCAX25GETINFO
> ============================================
> 
> The soundcard works well and I listen the system sounds of kde or
> music, but is impossible to work in soundmodem. Here is the errors:
> 
> Running soundmodem
> ===============
> soundmodem: error while loading shared libraries: libxml.so.1: cannot
> open shared object file: No such file or directory

This is a known problem. This package is missing in Slackware
9.1. Get if from Slackware 8.1 cd or mirror, install it, and
that's it.

Anyway, I've seen some problems with the soundmodem package built in
Slack 9.1. If you have some problems, try compiling it yourself, or I
can send you a binary file that works fine (at least for me).

Re: Soundmodem

[Arno Verhoeven]

iw2esa wrote:
> Hello,
> I've a little trouble using the ax25 soundmodem. Here is my conditions:
> 
> Slackware 9.1
> Kernel 2.4.22 with ax25 e soundmodem modules compiled
> Soundcard integrated in a MB Asus I810
> 

> 
> Running soundmodem
> ===============
> soundmodem: error while loading shared libraries: libxml.so.1: cannot open 
> shared object file: No such file or directory


You need to install libxml-1.8.17-i386-2.tgz which you can find in the 
/pasture directory on the CDROM.


-- 
73, PE1ICQ  Arno Verhoeven
--------------------------------
AX.25  pe1icq@pi8zaa.#nbo.nld.eu
smtp   pe1icq@pi8zaa.ampr.org
inet   pe1icq@amsat.org

Soundmodem

[iw2esa]

Hello,
I've a little trouble using the ax25 soundmodem. Here is my conditions:

Slackware 9.1
Kernel 2.4.22 with ax25 e soundmodem modules compiled
Soundcard integrated in a MB Asus I810

This is the output at boot:
=================================================
Intel 810 + AC97 Audio, version 0.24, 17:25:27 Oct 24 2004
i810: SiS 7012 found at IO 0xb000 and 0xac00, MEM 0x0000 and 0x0000, IRQ 18
i810_audio: Audio Controller supports 6 channels.
i810_audio: Defaulting to base 2 channel mode.
i810_audio: Resetting connection 0
ac97_codec: AC97 Audio codec, id: ALG16 (ALC200/200P)
i810_audio: AC'97 codec 0 supports AMAP, total channels = 2
es1371: version v0.32 time 17:25:30 Oct 24 2004
AX.25: Z8530 SCC driver version 3.0.dl1bke
mkiss: AX.25 Multikiss, Hans Albas PE1AYX
AX.25: 6pack driver, Revision: 0.3.0 (dynamic channels, max=31)
AX.25: bpqether driver version 004
baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA
baycom_ser_fdx: version 0.10 compiled 17:25:06 Oct 24 2004
hdlcdrv: (C) 1996-2000 Thomas Sailer HB9JNX/AE4WA
hdlcdrv: version 0.8 compiled 17:25:07 Oct 24 2004
baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA
baycom_ser_hdx: version 0.10 compiled 17:25:07 Oct 24 2004
usb.c: registered new driver hub
host/uhci.c: USB Universal Host Controller Interface driver v1.1
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
USB Mass Storage support registered.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 4096 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 32768)
IPv4 over IPv4 tunneling driver
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4
F6FBB/G4KLX ROSE for Linux. Version 0.64 for AX25.037 Linux 2.4
NET4: G4KLX/GW4PTS AX.25 for Linux. Version 0.37 for Linux NET4.0
kissparms uses obsolete (PF_INET,SOCK_PACKET)
xfbbd uses old SIOCAX25GETINFO
============================================

The soundcard works well and I listen the system sounds of kde or music, but 
is impossible to work in soundmodem. Here is the errors:

Running soundmodem
===============
soundmodem: error while loading shared libraries: libxml.so.1: cannot open 
shared object file: No such file or directory

Running gmfsk
===============
 gmfsk
audio_alsa: no cards found!

** (gmfsk:6084): WARNING **: FIXME: guard from double entry
Someone can to help me?
Best regards

-- 

73 de Antonio, IW2ESA
http://www.italinux.org Ham Portal
SySop of IW2ESA-8, UHF Access 430.480Mhz 1200 Bd
Telnet access telnet iw2esa.dyndns.org 3200
DxCluster IW2ESA-6 VHF 144.875Mhz 1200 Bd
Telnet access: telnet iw2esa.dyndns.org 7300

Soundmodem

[Mike Fenske]

Hello all. I am tying to get Thomas's userspace soundmodem working on an
IBM laptop. I have installed SuSE 7.3 and Kernel 2.4.8. AX25 is working
fine with baycom drivers. I have installed soundmodem from SuSE's rpm's.
Got it configured OK and soundmodem starts with no errors. If I check
ifconfig, it shows port ax0 up running. Next, using "call" I tried
"calling" a station, expecting to hear a packet from the internal speaker
(I haven't hooked up a radio yet). Nothing is heard. After stopping "call"
with Ctrl-C, I checked ifconfig again and see only 1 packet transmitted
(should be at least 2 I think). I am using alsa sound drivers and sound
card (ESS1688) works fine to play wav files, etc. 

Any suggestions??

Mike Fenske
VE7MKF