Is your station ready for hybrid radio?

What is being checked

• i
  info: RadioDNS lookup name

  08850.55f4.5a0.fm.radiodns.org (frequency 88.50 MHz, PI 55F4, country code 5a0)

1. RadioDNS registration

• ✓
  pass: Registered

  08850.55f4.5a0.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

  361 ms, 261,313 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: SAT A4-C4-DR1

  Matched on bearer fm:5a0.55f4.08850
• ✓
  pass: Short name: WAMU
• ✓
  pass: Medium name: SAT A4-C4-DR1
• ✓
  pass: Long name: NPR DR1 - Breaking News Channel
• !
  warn: No short description

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

  Reserved for NPR Breaking News Channel only.
• i
  info: No keywords

  Optional.
• ✓
  pass: 1 link

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

  fqdn radiodns.prss.org, service identifier 00000000000007e4

5. Logos

• i
  info: No logos in the file

  Optional, but receivers will show no station logo.

  What to do: Provide all five standard sizes (32x32, 112x32, 128x128, 320x240, 600x600) or none.

6. Transmitters and streams

• i
  info: Other bearer: hd:292.0ff77.2

  Not checked by this tool.
• !
  warn: Stream OK: https://ice24.securenetsystems.net/WAMU?playSessionID=F9F81C04-9409-2547-DFA70E4E1AF03C7B

  audio/aac, 64 kbps
  The file says audio/aacp but the stream answers audio/aac.
  The file says 128 kbps but the stream reports 64 kbps.
  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:5a0.55f4.08850

  cost 20
• i
  info: Other bearer: hd:292.0ff77

  Not checked by this tool.