Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 491D33800008E; Tue, 8 Jan 2013 17:32:49 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Tshhu-0003Yf-Jn for rs_out_1@blacksheep.org; Tue, 08 Jan 2013 22:31:42 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Tshht-0003YW-Sc for rsgb_lf_group@blacksheep.org; Tue, 08 Jan 2013 22:31:41 +0000 Received: from imr-da03.mx.aol.com ([205.188.105.145]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Tshhq-0003kl-Pg for rsgb_lf_group@blacksheep.org; Tue, 08 Jan 2013 22:31:40 +0000 Received: from mtaout-mb06.r1000.mx.aol.com (mtaout-mb06.r1000.mx.aol.com [172.29.41.70]) by imr-da03.mx.aol.com (Outbound Mail Relay) with ESMTP id CFBF41C0000F4 for ; Tue, 8 Jan 2013 17:31:16 -0500 (EST) Received: from Black (188-194-147-142-dynip.superkabel.de [188.194.147.142]) by mtaout-mb06.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 68136E00008B for ; Tue, 8 Jan 2013 17:31:15 -0500 (EST) Message-ID: <1751FF6A14644CC7A968E35A554BF7C4@Black> From: "Markus Vester" To: References: <871180718.807959.1357202851097.JavaMail.open-xchange@email.1und1.de> <8CFB7BD49F0E58C-6E8-60E@webmail-d164.sysops.aol.com> <4D45055C381D4BECA4B1BEF1254E1059@Black> In-Reply-To: <4D45055C381D4BECA4B1BEF1254E1059@Black> Date: Tue, 8 Jan 2013 23:31:10 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1357684276; bh=Jx39Y2MpM0p7ArQzP1uBPeoPTbkltyLW2Tj4XXFOZqQ=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=DpS1cv752F5BizKGv074P6I3W5a2Rnu/GXNdmhjWfcIZ90udhpAytJuNmFb6UNggr 8mpwYlkZ8dPO6zVHDmEp8yH/gzOADt5hawynHehdQAh5dnmRgHOoWJMd+0ahkL37Bx SVxZIZxf3wljha8xUoqUwUkC2OURsQZ3rwYufsRI= X-AOL-SCOLL-SCORE: 0:2:311555680:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: A few minutes ago I have uploaded an experimental SlowVoice script to http://www.df6nm.bplaced.net/slowvoice/SlowVoice.zip The main purpose is to be able to convey high quality speech in less than 800 Hz on the RF side, as prescribed by German LF and MF regulations. By default, an audio band of 300 to 2700 Hz is slowed by a factor of 3 and upconverted to 1500 Hz center frequency. Thus a range of 1200 to 2000 Hz is fed to the SSB transmitter. As an aside benefit we get a very much welcome 5 dB improvement in SNR. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [205.188.105.145 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: eec106d36eb876515d296e51093c048c Subject: LF: Slow Voice utility Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01CDEDF8.3D5E6080" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MISSING_OUTLOOK_NAME autolearn=no version=2.63 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-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mtain-dg03.r1000.mx.aol.com ; domain : mx.aol.com DKIM : fail X-AOL-OVERRIDE-PIK-REASON: Y x-aol-sid: 3039ac1d410b50ec9e913a26 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_002B_01CDEDF8.3D5E6080 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable A few minutes ago I have uploaded an experimental SlowVoice script to http://www.df6nm.bplaced.net/slowvoice/SlowVoice.zip The main purpose is to be able to convey high quality speech in less = than 800 Hz on the RF side, as prescribed by German LF and MF = regulations. By default, an audio band of 300 to 2700 Hz is slowed by a = factor of 3 and upconverted to 1500 Hz center frequency. Thus a range of = 1200 to 2000 Hz is fed to the SSB transmitter. As an aside benefit we = get a very much welcome 5 dB improvement in SNR. Like JT9-1, the procedure is clock-synchronized in fixed one-minute time = slots. At the beginning of the minute, the transmitting station is asked = to speak for 20 seconds. It feels a bit like to speaking to a telephone = answering machine ;-) The slow converted output of the growing audio = buffer begins to play immediately, and will go on during the whole = minute. On the receive side, fast replay begins at second number 40, and = the shrinking buffer will finally be used up by the end of the minute. The SlowVoice.bat script is set up for full duplex operation. One = channel is supposed to handle the transmit side (eg. mic connected to = left input, transmitter 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 further 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 connecting left line out to right in. If you want you can = use SpecLab in conjunction with Virtual Audio Cable to preprocess both = the mic and receiver audio inputs. In this case VAC will have to be = selected as the standard audio input device before the running the = script. 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 = supposed to activate the serial handshake lines (RTS and DTR) on either = even or odd minutes. Unfortunately the port control does not seem to = work on my XP machine with an external USB to serial converter, so for = the time being you may have to do with either vox control or manual = switching. 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 on Wolf's sound utilities which you will need to = download from the DL4YHF web site. You will have to run the included = patch utility once to duplicate SndInput and SndOutpt instances. Have fun! And please report bugs and other troubles. 73, Markus (DF6NM) ----- 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 ... Slow voice transmission (ie the audio deceleration/acceleration method = originally 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-automatic = control, with a fixed one minute raster similar to JT9-1. This will = hopefully allow us to comfortably 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? ... ------=_NextPart_000_002B_01CDEDF8.3D5E6080 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
A few minutes ago I have = uploaded an=20 experimental SlowVoice script to
http://www.= df6nm.bplaced.net/slowvoice/SlowVoice.zip
 
The main purpose is to be able to = convey high=20 quality speech in less than 800 Hz on the RF side, as prescribed by = German=20 LF and MF regulations. By default, an audio band of 300 to = 2700 Hz is=20 slowed by a factor of 3 and upconverted to 1500 Hz center frequency. = Thus a=20 range of 1200 to 2000 Hz is fed to the SSB transmitter. As an = aside=20 benefit we get a very much welcome 5 dB improvement in = SNR.
 
Like JT9-1, the procedure is = clock-synchronized in=20 fixed one-minute time slots. At the beginning of the minute, the = transmitting=20 station is asked to speak for 20 seconds. It feels a bit = like to=20 speaking to a telephone answering machine ;-) The slow converted = output of=20 the growing audio buffer begins to play immediately, and will go = on during=20 the whole minute. On the receive side, fast replay begins at second = number 40,=20 and the shrinking buffer will finally be used up by the end of the=20 minute.
 
The SlowVoice.bat script is set up for = full duplex=20 operation. One channel is supposed to handle the transmit side (eg. mic=20 connected to left input, transmitter to left output), while = the other=20 channel has the receiver fed to the input and phones on the = output.=20 This is symmetrical, and there is no further need to switch audio = pathways=20 between TX and RX. It is also possible to monitor the result of = one's own=20 transmission, eg. by physically connecting left line out to right = in. If=20 you want you can use SpecLab in conjunction with Virtual = Audio=20 Cable to preprocess both the mic and receiver audio inputs. In this = case=20 VAC will have to be selected as the standard audio input device before = the=20 running the script.
 
Whether a slots is used = for TX or RX=20 is not controlled by the software but only by the user's PTT. I have = included=20 two extra scripts which are supposed to activate the = serial handshake lines=20 (RTS and DTR) on either even or odd minutes. Unfortunately = the port=20 control does not seem to work on my XP machine with an external USB = to=20 serial converter, so for the time being you may have to = do with=20 either vox control or manual switching.
 
I haven't gotten around = writing more detailed=20 instructions, but some basic hints have been included in the SlowVoice = script.=20 Similar to the first slow WSPR = experiments, the=20 whole deceleration / acceleration process is based on Wolf's sound=20 utilities which you will need to download from the = DL4YHF web=20 site. You will have to run the included = patch=20 utility once to duplicate SndInput and=20 SndOutpt instances.
 
Have fun! And please report bugs and = other=20 troubles.
 
73, Markus (DF6NM)
 
 
 
 
----- Original Message -----=20
From: Markus = Vester=20
Sent: Sunday, January 06, 2013 1:50 PM
Subject: LF: Bandlimited SSB test on 136 kHz

...
 
Slow voice transmission (ie = the audio=20 deceleration/acceleration method originally used by DK8KW and myself) = would=20 be nicer as it can fit a full SSB channel into 800=20 Hz. I have been working on a semi-automatic control, = with a=20 fixed one minute raster similar to JT9-1. This will hopefully allow us = to=20 comfortably exchange one 20 second voice message per time slot=20 (speak during seconds 0 to 20, concurrent = transmit and receive at=20 1/3 speed from 0 to 60, replay starting 40 to 60). Anyone=20 interested?
 
...
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