Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 13E7638000081; Sat, 12 Jan 2013 10:13:32 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Tu2l5-0000AD-D6 for rs_out_1@blacksheep.org; Sat, 12 Jan 2013 15:12:31 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Tu2l4-0000A4-G5 for rsgb_lf_group@blacksheep.org; Sat, 12 Jan 2013 15:12:30 +0000 Received: from imr-mb01.mx.aol.com ([64.12.207.164]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Tu2l0-0004a8-PS for rsgb_lf_group@blacksheep.org; Sat, 12 Jan 2013 15:12:29 +0000 Received: from mtaout-ma03.r1000.mx.aol.com (mtaout-ma03.r1000.mx.aol.com [172.29.41.3]) by imr-mb01.mx.aol.com (Outbound Mail Relay) with ESMTP id F02B01C00015D for ; Sat, 12 Jan 2013 10:12:04 -0500 (EST) Received: from Black (188-194-147-156-dynip.superkabel.de [188.194.147.156]) by mtaout-ma03.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id EC2ECE0000D4 for ; Sat, 12 Jan 2013 10:12:03 -0500 (EST) Message-ID: From: "Markus Vester" To: References: <871180718.807959.1357202851097.JavaMail.open-xchange@email.1und1.de> <8CFB7BD49F0E58C-6E8-60E@webmail-d164.sysops.aol.com> <4D45055C381D4BECA4B1BEF1254E1059@Black> <1751FF6A14644CC7A968E35A554BF7C4@Black> <1358002148.84705.YahooMailNeo@web133206.mail.ir2.yahoo.com> In-Reply-To: <1358002148.84705.YahooMailNeo@web133206.mail.ir2.yahoo.com> Date: Sat, 12 Jan 2013 16:12:02 +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=1358003524; bh=oYnd/BmR2VFjcB3dZiJgMn2LtbAl7nRqNQRR7K6v3BI=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=LkywYQLqVpGD592riBGvtTLNWCdfuITTnc1QA2sEaasoG7yi9yZlDJzfe831nK7XA 0iNRsnW4shY6raZqW70b9MFiSyy9aBCR2oWqPWQTVgC94gjxTGGjKuwL/M+AOqtHec rvF4L7AjqhhNS0fV4+4i3kwdNH8vowRABZ6SFKls= X-AOL-SCOLL-SCORE: 0:2:423012832:93952408 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: Thanks Pete for the feedback. I have uploaded a .wma file of the 14:58 transmission received via Twente to http://www.df6nm.bplaced.net/slowvoice/ During the whole minute you can hear the slow narrowband audio up around 3 kHz. At 40 seconds into the recording the replay starts, and my original voice becomes audible. [...] 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 [64.12.207.164 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: 724ac9e5efcdf47d2c3cbc99664ee9b2 Subject: Re: LF: Slow Voice - testing on 137.0 kHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01CDF0DF.8ED52900" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_30_40,HTML_FONT_BIG, 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-dl02.r1000.mx.aol.com ; domain : mx.aol.com DKIM : pass x-aol-sid: 3039ac1d4ad050f17d9c3a7a 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_000B_01CDF0DF.8ED52900 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Thanks Pete for the feedback. I have uploaded a .wma file of the 14:58 = transmission received via Twente to http://www.df6nm.bplaced.net/slowvoice/ During the whole minute you can hear the slow narrowband audio up around = 3 kHz. At 40 seconds into the recording the replay starts, and my = original voice becomes audible. Best 73, Markus (DF6NM) ----- Original Message -----=20 From: M0FMT=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, January 12, 2013 3:49 PM Subject: Re: LF: Slow Voice - testing on 137.0 kHz Well done Marcus and co. Thank you for your innovative contributions to Ham Radio. Proving that = even with current technology the limits can be pushed further. In the UK (and I am sure elsewhere) there is a single channel VHF Parrot = type repeater which is operated in a similar way where you speak, drop = carrier, hear your own transmission rebroadcast and then wait for a = reply which some times can be heard directly on the channel and is then = re-enforced by the Parrot in the following transmission. It is slow and = laborious but many stations use it. I guess the difference is that you have an added element of delay each = way for audio frequency com/decompression which amounts to the Parrot in = the above case rebroadcasting each transmission only longer by a = factor.. Like to hear an audo file? 73 es GL Pete M0FMT IO91UX 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 for receive-only and transmit-only in mono mode. The serial port = PTT control utility has also been modified to function under WinXP. This afternoon I am sending a few slow voice tests with 3 times = deceleration in 1-minute frames. The 800 Hz wide passband is centered on = 137.0 kHz, thus 136.6 to 137.4 kHz corresponds to 0.3 to 2.7 kHz audio. = Attached screenshot 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 produced clear speech during 20 seconds = of each minute.=20 I intend to run some more test transmissions this afternoon, starting = now 14 UT. Any reports would be much appriciated! Best 73, Markus (DF6NM) =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 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? ... carr ------=_NextPart_000_000B_01CDF0DF.8ED52900 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Thanks Pete for the feedback. = I have uploaded a .wma file of the 14:58 = transmission=20 received via Twente to
http://www.df6nm.bplaced= .net/slowvoice/
 
During the whole minute you can hear the slow narrowband audio up = around 3=20 kHz. At 40 seconds into the recording the replay starts, and my = original=20 voice becomes audible.
 
Best 73,
Markus (DF6NM)
 
 
 
----- Original Message -----=20
From: M0FMT =
Sent: Saturday, January 12, 2013 3:49 PM
Subject: Re: LF: Slow Voice - testing on 137.0 = kHz

Well done Marcus and co.
 
Thank you for your innovative=20 contributions to Ham Radio. Proving that even with current technology the limits can be pushed=20 further.
 
In the UK (and I am sure elsewhere) there is a single channel = VHF Parrot type repeater which is operated in a similar way where = you=20 speak, drop carrier, hear your own transmission rebroadcast and = then wait=20 for a reply which some times can be heard directly on the channel and is = then=20 re-enforced by the Parrot in the following transmission. It is slow and=20 laborious but many stations use it.
 
I guess the difference is that you have an added element of=20 delay each way for audio frequency com/decompression which amounts = to the=20 Parrot in the above case rebroadcasting = each=20 transmission only longer by a factor..
 
Like to hear an audo file?

73 es GL Pete M0FMT IO91UX
From:=20 Markus Vester <markusvester@aol.com>
To: = rsgb_lf_group@blacksheep.org=20
Sent: Saturday, 12 = January=20 2013, 14:03
Subject: LF: Slow=20 Voice - testing on 137.0 kHz

=EF=BB=BF=20
Yesterday = morning I have=20 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=20 added simplified scripts for receive-only and transmit-only in mono = mode. The=20 serial port PTT control utility has also been modified=20 to function under WinXP.
 
This afternoon I am sending a few slow voice tests = with 3=20 times deceleration in 1-minute frames. The 800 Hz wide = passband is=20 centered on 137.0 kHz, thus 136.6 to 137.4 kHz corresponds to 0.3 = to 2.7=20 kHz audio. Attached screenshot shows the narrow SSB = signal on=20 the Twente WebSDR tuned to 135.5 kHz USB. I used a narrow=20 passband to improve rejection for DCF and HGA. This=20 audio around fc=3D1500 Hz was fed to the receive-only = utility,=20 which then produced clear speech during 20 seconds of=20 each minute. 
 
I intend to run some more test transmissions this = afternoon,=20 starting now 14 UT. Any reports would be much=20 appriciated!
 
Best 73,
Markus (DF6NM)  
 
 
 
-----=20 Original Message -----=20
From: Markus = Vester
Sent: Tuesday, January 08, 2013 11:31 PM
Subject: LF: Slow Voice utility

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=20 convey high quality speech in less than 800 Hz on the RF = side, as=20 prescribed by German LF and MF regulations. By default, an = audio=20 band of 300 to 2700 Hz is slowed by a factor of 3 and upconverted to = 1500 Hz=20 center frequency. Thus a range of 1200 to 2000 Hz is fed to = the=20 SSB transmitter. As an aside benefit we get a very much = welcome 5 dB=20 improvement in SNR.
 
Like JT9-1, the procedure is = clock-synchronized=20 in fixed one-minute time slots. At the beginning of the minute, the=20 transmitting station is asked to speak for 20 seconds. It feels a = bit=20 like to speaking to a telephone answering machine ;-) = The slow=20 converted output of the growing audio buffer begins to play = immediately, and=20 will go on during the whole minute. On the receive side, fast = replay=20 begins at second number 40, and the shrinking buffer will finally = be used=20 up by the end of the minute.
 
The SlowVoice.bat script is set up = for full=20 duplex operation. One channel is supposed to handle the transmit side = (eg. mic=20 connected to left input, transmitter to left output), while = the=20 other channel has the receiver fed to the input and phones = on the=20 output. This is symmetrical, and there is no further need to switch = audio=20 pathways between TX and RX. It is also possible to monitor the = result of=20 one's own transmission, eg. by physically connecting left line = out to=20 right in. If you want you can use SpecLab in conjunction=20 with Virtual Audio Cable to preprocess both the mic and = receiver=20 audio inputs. In this case VAC will have to be selected as the = standard audio=20 input device before the running the script.
 
Whether a slots is used = for TX=20 or RX is not controlled by the software but only by the user's = PTT. I=20 have included two extra scripts which are supposed to activate the=20 serial handshake lines (RTS and DTR) on either even or odd = minutes.=20 Unfortunately the port control does not seem to work on = my XP=20 machine with an external USB to serial converter, so for the time = being=20 you may have to do with either vox control or=20 manual switching.
 
I haven't gotten around = writing more=20 detailed instructions, but some basic hints have been included in the=20 SlowVoice script. Similar to the = first slow=20 WSPR experiments, the whole deceleration / acceleration process is = based=20 on Wolf's sound utilities which you will need to download=20 from the DL4YHF web site. You will have=20 to run the included patch utility once to duplicate SndInput and=20 SndOutpt instances.
 
Have fun! And please report bugs and = other=20 troubles.
 
73, Markus (DF6NM)
 
 
 
 
-----=20 Original Message -----=20
From: Markus = Vester
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,=20 with a fixed one minute raster similar to JT9-1. This will = hopefully=20 allow us to comfortably exchange one 20 second voice message per time = slot=20 (speak during seconds 0 to 20, concurrent = transmit and receive=20 at 1/3 speed from 0 to 60, replay starting 40 to 60). Anyone=20 interested?
 
...


 carr ------=_NextPart_000_000B_01CDF0DF.8ED52900--