Is your station ready for hybrid radio?

What is being checked

• i
  info: WLRH - HUNTSVILLE, AL

  From the NRSC list: 89.30 MHz, PI code 7375, FCC facility 719.
• i
  info: RadioDNS lookup name

  08930.7375.7a0.fm.radiodns.org (frequency 89.30 MHz, PI 7375, country code 7a0)

1. RadioDNS registration

• ✓
  pass: Registered

  08930.7375.7a0.fm.radiodns.org points to the station's authoritative domain: radiodns.prss.org

2. Service discovery (SRV records)

• i
  info: _radiospi._tcp.radiodns.prss.org: not published
• ✓
  pass: _radioepg._tcp.radiodns.prss.org published

  priority 10, weight 60, port 80 -> radiodns.prss.org [target is an alias of contentdepot.prss.org]
• !
  warn: SRV target radiodns.prss.org is a CNAME alias

  DNS rules (RFC 2782) say an SRV record should point at a name that has address records directly, not at an alias. Many resolvers cope, some do not.

  What to do: Give radiodns.prss.org its own A/AAAA record (or point the SRV record at the real host name).
• !
  warn: Only the older _radioepg record is published

  What to do: Add _radiospi._tcp.radiodns.prss.org on port 443 as well, so receivers that use HTTPS can find the SI file.
• i
  info: _radiovis._tcp: not published

  Slideshow/visuals (STOMP) - optional, only needed for a live slideshow service.
• i
  info: _radiopush._tcp: not published

  Slideshow/visuals (Server-Sent Events) - optional, only needed for a live slideshow service.
• i
  info: _radiovis-http._tcp: not published

  Slideshow/visuals (HTTP) - optional, only needed for a live slideshow service.

3. Service Information file (SI.xml)

• ✓
  pass: HTTP endpoint http://radiodns.prss.org/radiodns/spi/3.1/SI.xml answered

  677 ms, 261,419 bytes
• ✓
  pass: Content type is application/xml
• !
  warn: SI file has no caching headers

  What to do: Add Cache-Control: max-age (for example 86400 for 24 hours). Without it, receivers guess - and some ignore the content.
• ✓
  pass: The file follows the official SI schema (current (3.4/3.5))

  Validated against the schema published by WorldDAB/RadioDNS.

Guides: Make an SI file accessible (PDF) · Build an SI file with RadioDNS's tool

4. Your station in the file

• i
  info: 76 services in the file
• ✓
  pass: Station found: 89.3 WLRH HD1

  Matched on bearer fm:7a0.7375.08930
• ✓
  pass: Short name: WLRH HD1
• ✓
  pass: Medium name: 89.3 WLRH HD1
• ✓
  pass: Long name: 89.3 WLRH HD1 Huntsville Public Radio
• !
  warn: No short description

  What to do: Add a one-sentence description (up to 180 characters).
• ✓
  pass: Long description present

  WLRH was launched on October 13, 1976 and is Alabama’s original full-service public radio station. WLRH is a non-commercial public radio station with the primary mission of supporting education, the arts and community...
• i
  info: No keywords

  Optional.
• ✓
  pass: 1 link

  https://wlrh.org
• ✓
  pass: The <radiodns> element matches the registration

  fqdn radiodns.prss.org, service identifier 0000000000001266

5. Logos

• ✓
  pass: All five standard logo sizes are listed
• !
  warn: Logos have no caching headers

  What to do: Add Cache-Control: max-age (for example 86400 for 24 hours). Without it, receivers guess - and some ignore the content.
• !
  warn: 7 logos downloaded and checked

Preview	Declared	Actual	Size	Result
	32x32	32x32	335 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385482.png
	112x32	112x32	391 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385400.png
	170x170	170x170	4,134 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385398.png
	600x600	600x600	26,240 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385488.png
	1080x1080	1080x1080	53,616 B	54 kB (under 50 kB recommended) http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385396.png
	128x128	128x128	2,765 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385484.png
	320x240	320x240	7,274 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/WLRH_Huntsville_Public_Radio_Logo%202_168385486.png

6. Transmitters and streams

• !
  warn: Stream OK: https://wlrh.streamguys1.com:80/live.m3u

  audio/x-mpegurl
  The file says audio/mpeg but the stream answers audio/x-mpegurl.
  No offset set (optional): if the stream runs behind the broadcast, an offset in milliseconds lets receivers line the two up.
• ✓
  pass: FM bearer fm:7a0.7375.08930

  cost 20