"This is WZYN coming out from Boston, running up to 500 KW to 1MW! Operating at 4.78 Mhz" -WZYN
Summary
WZYN or Zynden's Radio Z (formerly known as Zynden's Random Music's) Is a AM, FM and DRM station that Broadcasts on 7.38 (no longer active), 4.78, 4.48 (Japan) and 96.2 MHZ. WZYN Features Radiogram (Ex. MFSK 64 and 32) and DRM with Journaline and Slideshow Services.
History
Zynden's Random Music's started as a Pirate random music station (hence the name) on July 2, 2026. Its original frequency was 7.68 MHz AM, but it later moved to other frequencies, such as 7.45, 7.39, 7.12, and 7.10 MHz. Finally, it settled at 7.38 MHz. At the time, its only focus was to blast music for people to enjoy.
Later, on July 20, Zynden's Random Music changed its name to Zynden's Radio 7.38 to reflect that the station now broadcasted on 7.38 MHz exclusively. At this point, the station no longer just blasted music; it also began sending images via MFSK, DRM (EasyPal), SSTV, and KG-STV. On July 22, the station became a official licenced station then renamed itself one final time (potentially) to Zynden's Radio Z or WZYN, which later became its most recognizable name.
On August 5, WZYN participated in Shortwave Radiogram. On August 22, WZYN began DRM transmissions as an experimental station using Robustness mode D, which would later become permanent and use Robustness mode A instead. Then, on August 30, WZYN shut down its 7.38 MHz frequency to move to 4.78 Mhz. Following that day, WZYN announced the launch of a sister station, WZYN Japan Featuring Hatsune Miku.
On September 1st, WZYN announced the upcoming new Shortwave station, which would be part of the Latin region. Following that same day, they are launching an exclusive WZYN satellite HD Radio on 1.49 Ghz as a experimental station.
Later on September 2nd, WZYN added MOT Website service to DRM. Considering the fact that the transmitter isn't functioning properly.
WZYN recently completed several major broadcasting upgrades throughout September 2026. On September 4, the station finalized its 24/7 FM broadcast on 96.2 MHz. Following this, operators extended the Digital Radio Mondiale (DRM) broadcast schedule on September 27 to run from 03:00 to 10:30 UTC to better serve corresponding time zones. Finally, on September 29, WZYN Changed its DRM playback by switching from xHE-AAC to HE-AAC v2 P-Stereo while simultaneously merging the Journaline text service into the primary audio stream.
Shortwave Radiogram
Hosted by Dr. Kim Andrew Elliott, Shortwave Radiogram (formerly known as VOA Radiogram) broadcasts on a regular schedule every Sunday at 14:30 UTC and Thursday at 23:30 UTC. The program transmits digital text and images over analog shortwave signals using the following structured format:
MFSK32: Program Preview
MFSK32: Article 1 (May or may not include an embedded photograph)
MFSK64: Article 2 (Mostly includes an embedded photograph)
MFSK64: "This Week's Images" gallery
MFSK32: Closing Announcements
Shortwave Radiogram also has 2 other participating Stations:
Like The Mighty KBC and Pop Shop Radio, WZYN also has its own radiogram (WZYN/Zynden's Radiogram) that only transmits occasionally during special events. Examples include tributes, historical features, celebrity birthdays, and anniversaries.
Frequencies / Schedule
Stations
Power (KW)
Frequencies
Modes
Schedule
Location
Target
WZYN Japan
100KW
4.48 Mhz
AM, DRM
22:00 to 12:00 UTC
Yamato, kanagawa Japan
Japan Region
WZYN (Zynden's Radio Z)
500KW (1MW for DRM international)
7.38 (now 4.78 Mhz)
AM, DRM
11:00 to 01:00 UTC
Boston, massachusetts USA
USA (Internatonal on DRM)
WZYN FM
30KW
96.2 Mhz
WFM
24/7
Boston, massachusetts USA
Local
Schedules on DRM:
DRM and AM schedules
DRM
AM
Weekdays 03:00 to 10:30 UTC
Weekends 21:00 to 00:00 UTC
Weekdays 11:00 to 01:00 UTC
Weekends 11:00 to 01:00 UTC (DRM Time gap between 21:00 to 00:00 UTC)
During the DRM phase:
DRM Specs
Type
Codec
Robustness
SDC
MSC
Bandwidth
Power
TX Type
Experimental
AAC Stereo
D
16 QAM
16 QAM
10Khz
500Kw
Software
Limited
Opus Stereo (Undecodable on certain DRM receivers)
A/B
16 QAM
64 QAM
10Khz
1MW (For international)
Software
Final
HE-AAC v2 Parametric Stereo
A
16 QAM
64 QAM
10Khz
1MW (For international)
Hardware
DRM Protection Setup
Type
Protection Setup
Protection Part A
Protection Part B
Experimental
UEP (Unequal Error Protection)
0 (Cannot change due to a mathematical limit.)
(Code Rate 0.5)
1 (Code Rate 0.62)
Limited
EEP (Equal Error Protection)
N/A
3 (Code Rate 0.78)
Final
EEP (Equal Error Protection)
N/A
3 (Code Rate 0.78)
More DRM Information:
Type
Service Name
Service Type
Language
Programme Type
ID
Kbps
Experimental
WZYN DRM Test
1: Audio
English
Varied
E01001
7.62 Kbps
Limited
WZYN INT (Ltd)
1: Audio
Multiple Languages
Varied
E01307
34.76/27.44 Kbps
Final
WZYN INT
1: Audio + MM (Journaline)
Multiple Languages
Varied
E0130A
30.92 Kbps
(1.93 with MM)
Final
WZYN Slides
2: MOT Slideshow
N/A
N/A
E0130B
0.96 Kbps
Final
WZYN Website
2/3: MOT Website
N/A
N/A
E0130B/C
1.92/0.96 Kbps
Status
Modes
Status
Reason
AM
Active
N/A
DRM
Active
DRM is now back!
FM
Active
WZYN FM is now active!
DRM Reception Types.
The entire types of WZYN during the DRM phase
WZYN DRM Radio (Now)WZYN DRM Radio (During the testing phase)WZYN DRM Radio (Ltd. The receiver did not have the Opus codec.)
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Trivia
Did you know that WZYN USA has 4 Radio towers in different directions?
