WinDRM Download
Audio and Fast Data over HF SSBLast Updated:
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WinDRM DownloadAudio and Fast Data over HF SSBLast Updated: |
Weekend AOR Digital Voice Net will is QRV every Saturday / Sunday - Summer 2:00PM EDT, 1800 UTC, Winter 2:00PM EST, 1900 UTC - 14.236 QRG USB. WinDRM / FDMDV Digital Voice Net follows at 3:00PM EDT, 1900 UTC , Winter 3:00PM EST 2000 UTC - 14.236 QRG USB.
WinDRM_QuickSetupV1r1.pdf ( ) - WinDRM Quick Setup Documentation
tune.wav, g.wav, b.wav
( )
- .WAV files required for TUNE, G and B buttons.
Extract into same directory as windrm.exe.
Download and install only if you are a new WinDRM user - you do NOT need
to download a new copy if you already have WinDRM installed.
Please join the new digitalvoice
Mailing List for release announcements, upgrades and help using WinDRM.
New releases are announced to the mailing list first and this page is
updated afterwards as soon as I can.
WinDRM 19-Mar-06 Release Progress of transmit Lead-In and segments now shown as a percentage in the Info box during transmit of pics (TX Pic). When a BSR request is being transmitted, "BSR" will appear in the Codec box. Up to 7 sound cards including Virtual Audio Cables (VAC) are now recognized. Receive audio (decoded voice) may be recorded by checking "Save audio" under the Setup>Codec>. While Save Audio is checked, the audio is recorded and saved as a mlp file (audio.mlp) in the WInDRM directory. Convert mlp file to wav with Cesco's "Audio Convert" utility found at http://212.254.198.33/audioconv.zip . Install this utility in the WinDRM directory with the mlp file. The utility will playback the audio and create a wave file (audio.wav) for playback on any wave player. Note: This release adds the ability to play the G, B and ID wave files in all sound cards (previous releases allowed only the first card to play these files). However, with this change, these wave files must now have a sample rate of 48,000. Audacity (a free open source audio editor) may be used for this conversion found at http://audacity.sourceforge.net/
WinDRM 3-Nov-05 Release The main changes were: Added "Spacebar PTT". WinDRM may now be started by pressing the spacebar when the TX Pic or TX Voice button is in focus. A second push on spacebar returns WinDRM to receive. Note: This feature is active while either TX Pic or TX Voice button is in focus. Press "tab" on the keyboard to disable (un-focus). Under Setup>Display: Added "Flicker reduced waterfall" for laptop and possible other fast LCD type displays and "Static waterfall" was renamed to "Waterfall".
WinDRM 25-Oct-05 Release Notes updated 25-Oct-05 by K0PFX, K9FB, N1SU This version incorporates the new audio protocol. Tests seem to show that increased bitrates (Mode A, 64QAM, MSC Low Protection, or just click the Speed button and select 64QAM) yield better audio quality approaching the quality of the AOR modems. Under PTT port you will see new options for "PTT on CTS" and "PTT on DSR". The CTS and DSR inputs are used for remote keying of digital voice transmissions, not image transmissions. By connecting an active high signal from your microphone PTT to the CTS or DSR line, you can key and unkey your voice transmissions from the microphone switch or a foot switch without using the on-screen "Voice TX" button. It's very convenient. Currently the CTS/DSR options are "reversed" and fixed using a null modem cable. This behavior is expected to change in the next release so that a standard cable can be used without any troubles. Also changed are the TX defaults (2.3 to 2.5 and Mode B to A).
WinDRM 17-Apr-05 10:25 Release Notes updated 17-Apr-05 by N1SU This version corrects a small bug relating to selecting Mode E. ARQ does not work in nets, only station to station. Use BSR for "ARQ" functionality in nets.
WinDRM 18-Mar-05 18:06 Release Notes updated 18-Mar-05 by N1SU This new version provides the capability to stack BSR requests and responses. example: -stn a sends pic -stn c receives with error, presses BSR -stn b sends pic -stn c receives with error, presses BSR -stn a sends another pic -stn c receives with error, presses BSR -stn c has 3 BSR windows open now, and sends them one after the other. -stn a will have 2 BSR request windows open now, and sends them one after the other. -stn b will have 1 BSR request window open, and sends it. -stn c gets everything corrected.
WinDRM 24-Feb-05 20:18 Release Notes updated 24-Feb-05 by N1SU 24-Feb-05 20:18 New replay button to replay last sent file
WinDRM 19-Feb-05 18:06 Release Notes updated 19-Feb-05 by N1SU 19-Feb-05 18:06 New QAM-4 option for use during poor band conditions Use of QAM-4 produces a robust waveform that is more tolerant of QRM and other noise. Transfer rates are approximately 40% slower using the default options with QAM-4, however the reduction in speed can be mitigated by using the "Speed" options for QAM-4 - click the Speed button, then QAM-4. This will set Mode A DRM waveform - MSC protection option has no effect for QAM-4. Mode A is preferable for use under all circumstances except when band conditions are suffering.
WinDRM 3-Feb-05 14:26 Release Notes updated 4-Feb-05 by N1SU 3-Feb-05 14:26 Increased filebuffer size and improved BSR operation The TUNE.WAV file is separate from the regular install to save space. You will need to download and install it only if you have never used WinDRM before. Download http://n1su.com/windrm/tune-g-b.zip and uncompress the file into the same directory as where you installed WinDRM. New Features: The Picture RX now has a filebuffer of 5 elements. It should remember the segments of the last 5 received files. example: -you receive file1.jpg, but only 100 out of 200 segments. -you receive file2.jpg -you receive file3.jpg -you receive file1.jpg again. WinDRM will have part of file1.jpg in its filebuffer and complete the file on the next pass. The advantage of multiple transmissions is not cancelled if you receive a file "in between". BSR does work very well in a 2 station qso. We have been able to transfer 50kb files in conditions where only 30% of the data is decoded. BSR is difficult to handle in multi-station qso's. the bsr button must be pressed before the rx is locking to another signal. Example: -you do receive file1.jpg, but only 100 out of 200 segments. -now, you have immediatly to press BSR, but not yes. -another station sends file2.jpg. -when freq is clear, you press yes on the BSR messagebox and send. Received files/pictures are saved in "pictures" directory. Filenames up to 80 characters are supported 8 COM ports are supported 23-Jan-05 13:15 Notes Waterfall color changed to blue hues. TUNE.WAV file is sent when TUNE button pressed - the TUNE.WAV file included in the .zip file is calibrated for optimal level outputs for adjusting microphone gain and tuning an amplifier. Adjust your microphone gain so that ALC is eliminated while the TUNE tones are heard. Do not adjust microphone gain after adjustments are made. NO speech processing should be used with WinDRM and or ALC action should be seen. TUNE only needs to be used when you change output power, microphone gain or turn on your linear amplifier. Close attention to tuning with a linear amplifier is required or SNR will suffer greatly. ID.WAV file is sent when ID button pressed - this feature is for sending a "vanity" waveform similar to other programs that send a text "image" into the waterfall. Buttons: BSR -- Bad Segment Report -- creates "rx_report.txt" in windrm directory. Reports what segments are missing after receiving a data transfer. SPA -- Show Pic Anyway -- shows what is in the picture memory, complete or not, intended for use when receiving an image file when some parts are missing, jp2 files for example. Only errored file transfers will produce a result from the BSR or SPA buttons. Any files received correctly will not produce output for BSR or SPA. ID -- Play ID.WAV file, must be present in the windrm directory. The file should be 48KHz sample rate or problems may occur. DRM RX Settings window: Frequency Acquisition Sensitivity: Higher values: Will produce false locks on good signals, delaying decode. Lower values: Will eventually not lock on "difficult" signals. Sequence: Freq. lock -> Timing Lock -> FAC decode -> MSC decode Freq. Acq. is searching for the 3 frequency pilots (tuning tones, also shown in red areas of waterfall line). It compares the tuning tone amplitude to the surrounding audio signal. Info Box on main screen: On TX: File # / % of file sent File #0 is the LEAD IN (first segments of file + last segment) "Lead-in" is sent to allow RX synchronization before actual data starts. Lead-in is always present; lead-in length may be configured "Long" in TX Pic (recommended). On RX: Segments "we know about" / segments sucessfully decoded "we know about" segment count is unknown until last segment arrives. On RX Voice: % of sucessfully decoded frames (400ms) in last 60 seconds Tips about data transfer: WinDRM creates a unique transport ID to each data transfer based upon the file being sent. If a file is not received on the first transmission, the sending station can send the file again (typically with 1 instance) and the receiving station will be able to recover the lost frames. This only works if the same file is received by the receiving station and no new data transfers sent. Any new transfers (different transport ID) will clear the picture memory and the transfer process must be repeated from the beginning. If you do not receive the file on the first transmission, ask the sending station to resend a single instance of the file before receiving any new files. Please join the digitalvoice mailing list at http://groups-beta.google.com/group/digitalvoice for future announcements, upgrades and help using the software.
Please join the new digitalvoice
Mailing List for release announcements, upgrades and help using WinDRM.
New releases are announced to the mailing list first and this page is updated afterwards as soon as I can.
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