Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,SPF_PASS, T_DKIM_INVALID,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=3 Fuz1=3 Fuz2=3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v7CAlFa4011750 for ; Sat, 12 Aug 2017 12:47:17 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dgTtD-0007PN-Fd for rs_out_1@blacksheep.org; Sat, 12 Aug 2017 11:43:31 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dgTtC-0007PE-NG for rsgb_lf_group@blacksheep.org; Sat, 12 Aug 2017 11:43:30 +0100 Received: from omr-m019e.mx.aol.com ([204.29.186.18]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1dgTt8-0004C0-01 for rsgb_lf_group@blacksheep.org; Sat, 12 Aug 2017 11:43:29 +0100 Received: from mtaomg-aaf02.mx.aol.com (mtaomg-aaf02.mx.aol.com [172.26.127.100]) by omr-m019e.mx.aol.com (Outbound Mail Relay) with ESMTP id B9C6A3800089 for ; Sat, 12 Aug 2017 06:43:22 -0400 (EDT) Received: from core-acb02c.mail.aol.com (core-acb02.mail.aol.com [172.27.24.2]) by mtaomg-aaf02.mx.aol.com (OMAG/Core Interface) with ESMTP id 691E938000081 for ; Sat, 12 Aug 2017 06:43:22 -0400 (EDT) Received: from 188.192.44.165 by webprd-a12.mail.aol.com (10.72.12.230) with HTTP (WebMailUI); Sat, 12 Aug 2017 06:43:22 -0400 Date: Sat, 12 Aug 2017 06:43:22 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15dd60a8d6d-4dd9-1327f@webprd-a12.mail.aol.com> In-Reply-To: References: MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1502534602; bh=ThFXKUIdcUgPrpg4lW0tkyd88UXsxNnMho6Lak55r8U=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=P0oedArjrEuSZpwJwWTybXQwEt799kobGjCR3KxA62lncwRDVU3ovJE0CGkM9azf2 7zm82iA9a/W9qp8zqPWYSHVc+ENRKU+AyicarlCMsfkBCRBaXhTEiYunoXreY250mg RSCF3dXX1f3qNggeMN+3O+HPtE2o4HlErj0wnb90= x-aol-sid: 3039ac1a7f64598edbca3233 X-Scan-Signature: e9930714581255985cd8ec23e321b0b6 Subject: Re: LF: QRSSB for LF, MF and SW Content-Type: multipart/alternative; boundary="----=_Part_92621_703689274.1502534602091" X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 12367 ------=_Part_92621_703689274.1502534602091 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Thomas, thanks for this hint! Since the early experiments with Geri DK8KW (owner of= www.qru.de), I have always maintained an interest in LF voice communicatio= n.=20 A similar method has been tried in 2013, using a deceleration factor of 3, = and some automated scripts for a QSO format with a fixed one-minute time ra= ster (see emails below). A couple of audio results from Twente have been up= loaded to http://www.df6nm.bplaced.net/slowvoice/ (wma files). Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Thomas Rosenkranz An: rsgb_lf_group Verschickt: Sa, 12. Aug 2017 12:06 Betreff: LF: QRSSB for LF, MF and SW Hi Group, =20 here is a new program for (qr)ssb on LF, MF and SW. This program allows the telephony on LF and MF. Have fun with experimenting. =20 http://dl0rcp.bplaced.net/index.php/webapps-2/qrssb =20 vy 73 Thomas DM4TR _________________________________________________________ From: Markus Vester To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, 12 January 2013, 14:03 Subject: LF: Slow Voice - testing on 137.0 kHz =EF=BB=BF=20 Yesterday morning I have uploaded a new version SlowVoice v0.2 to http://www.df6nm.bplaced.net/slowvoice/SlowVoice.zip I have reworked some details of the timing, and added simplified scripts fo= r receive-only and transmit-only in mono mode. The serial port PTT control = utility has also been modified to function under WinXP. =20 =20 This afternoon I am sending a few slow voice tests with 3 times deceleratio= n in 1-minute frames. The 800 Hz wide passband is centered on 137.0 kHz, th= us 136.6 to 137.4 kHz corresponds to 0.3 to 2.7 kHz audio. Attached screens= hot shows the narrow SSB signal on the Twente WebSDR tuned to 135.5 kHz USB= . I used a narrow passband to improve rejection for DCF and HGA. This audio= around fc=3D1500 Hz was fed to the receive-only utility, which then produc= ed clear speech during 20 seconds of each minute.=20 =20 I intend to run some more test transmissions this afternoon, starting now 1= 4 UT. Any reports would be much appriciated! =20 Best 73, Markus (DF6NM) =20 =20 =20 =20 ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, January 08, 2013 11:31 PM Subject: LF: Slow Voice utility A few minutes ago I have uploaded an experimental SlowVoice script to http://www.df6nm.bplaced.net/slowvoice/SlowVoice.zip =20 The main purpose is to be able to convey high quality speech in less than 8= 00 Hz on the RF side, as prescribed by German LF and MF regulations. By def= ault, an audio band of 300 to 2700 Hz is slowed by a factor of 3 and upconv= erted to 1500 Hz center frequency. Thus a range of 1200 to 2000 Hz is fed t= o the SSB transmitter. As an aside benefit we get a very much welcome 5 dB = improvement in SNR. =20 Like JT9-1, the procedure is clock-synchronized in fixed one-minute time sl= ots. At the beginning of the minute, the transmitting station is asked to s= peak for 20 seconds. It feels a bit like to speaking to a telephone answeri= ng machine ;-) The slow converted output of the growing audio buffer begins= to play immediately, and will go on during the whole minute. On the receiv= e side, fast replay begins at second number 40, and the shrinking buffer wi= ll finally be used up by the end of the minute. =20 The SlowVoice.bat script is set up for full duplex operation. One channel i= s supposed to handle the transmit side (eg. mic connected to left input, tr= ansmitter to left output), while the other channel has the receiver fed to = the input and phones on the output. This is symmetrical, and there is no fu= rther need to switch audio pathways between TX and RX. It is also possible = to monitor the result of one's own transmission, eg. by physically connecti= ng left line out to right in. If you want you can use SpecLab in conjunctio= n with Virtual Audio Cable to preprocess both the mic and receiver audio in= puts. In this case VAC will have to be selected as the standard audio input= device before the running the script. =20 Whether a slots is used for TX or RX is not controlled by the software but = only by the user's PTT. I have included two extra scripts which are suppose= d to activate the serial handshake lines (RTS and DTR) on either even or od= d minutes. Unfortunately the port control does not seem to work on my XP ma= chine with an external USB to serial converter, so for the time being you m= ay have to do with either vox control or manual switching. =20 I haven't gotten around writing more detailed instructions, but some basic = hints have been included in the SlowVoice script. Similar to the first slow= WSPR experiments, the whole deceleration / acceleration process is based o= n Wolf's sound utilities which you will need to download from the DL4YHF we= b site. You will have to run the included patch utility once to duplicate S= ndInput and SndOutpt instances. =20 Have fun! And please report bugs and other troubles. =20 73, Markus (DF6NM) =20 ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Sunday, January 06, 2013 1:50 PM Subject: LF: Bandlimited SSB test on 136 kHz ... =20 Slow voice transmission (ie the audio deceleration/acceleration method orig= inally used by DK8KW and myself) would be nicer as it can fit a full SSB ch= annel into 800 Hz. I have been working on a semi-automatic control, with a = fixed one minute raster similar to JT9-1. This will hopefully allow us to c= omfortably exchange one 20 second voice message per time slot (speak during= seconds 0 to 20, concurrent transmit and receive at 1/3 speed from 0 to 60= , replay starting 40 to 60). Anyone interested? =20 ... ------=_Part_92621_703689274.1502534602091 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Thomas,

thanks for this hint! Since the early = experiments with Geri DK8KW (owner of www.qru.de), I have always maintained= an interest in LF voice communication.

A similar method has been t= ried in 2013, using a deceleration factor of 3, and some automated scripts&= nbsp;for a QSO format with a fixed one-minute time raster (see emails below= ). A couple of audio results from Twente have been uploaded to ht= tp://www.df6nm.bplaced.net/slowvoice/ (wma files).

Best 73,
Marku= s (DF6NM)



-----Urspr=C3=BCngliche Mitteilung-----
V= on: Thomas Rosenkranz <Thomas.Rosenkranz.1@gmx.de>
An: rsgb_lf_gro= up <rsgb_lf_group@blacksheep.org>
Verschickt: Sa, 12. Aug 2017 12:= 06
Betreff: LF: QRSSB for LF, MF and SW

 
<= font face=3D"Arial" size=3D"2">Whether a slots is used for TX o= r RX is not controlled by the software but only by the user's PTT. I = have included two extra scripts which are supposed to activate the seria= l handshake lines (RTS and DTR) on either even or odd minutes. = Unfortunately the port control does not seem to work on my XP m= achine with an external USB to serial converter, so for the time being yo= u may have to do with either vox control or manual sw= itching.
 
I haven't gotten around writing more detailed instructions, but som= e basic hints have been included in the SlowVoice script. Similar to the first slow WSPR experiments, the w= hole deceleration / acceleration process is based on Wolf's sound ut= ilities which you will need to download from the DL4YHF we= b site. You will have to run the inc= luded patch utility once to duplicate SndInput and SndOutpt instance= s.
 
Have fun! And please r= eport bugs and other troubles.
 
73, Markus (= DF6NM)
  =
 
----- Original Message -----
Sent: Sunday, January 06, 2013 1:50 PM
Su= bject: LF: Bandlimited SSB test on 136 kHz
...
 
Slow voice transm= ission (ie the audio deceleration/acceleration method originall= y used by DK8KW and myself) would be nicer as it can fit a full= SSB channel into 800 Hz. I have been working on a semi-au= tomatic control, with a fixed one minute raster similar to JT9-1. Th= is will hopefully allow us to comfortably exchange one 20 second voice me= ssage per time slot (speak during seconds 0 to 20, concurrent transm= it and receive at 1/3 speed from 0 to 60, replay starting = 40 to 60). Anyone interested?
 
...
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