Is your station ready for hybrid radio?

What is being checked

• i
  info: WWIN-FM - GLEN BURNIE, MD

  From the NRSC list: 95.90 MHz, PI code 8F9D, FCC facility 54710.
• i
  info: RadioDNS lookup name

  09590.8f9d.8a0.fm.radiodns.org (frequency 95.90 MHz, PI 8F9D, country code 8a0)

1. RadioDNS registration

• ✓
  pass: Registered

  09590.8f9d.8a0.fm.radiodns.org points to the station's authoritative domain: r1dns.com

2. Service discovery (SRV records)

• i
  info: _radiospi._tcp.r1dns.com: not published
• ✓
  pass: _radioepg._tcp.r1dns.com published

  priority 0, weight 100, port 80 -> r1dns.com
• !
  warn: Only the older _radioepg record is published

  What to do: Add _radiospi._tcp.r1dns.com 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://r1dns.com/radiodns/spi/3.1/SI.xml answered

  91 ms, 42,549 bytes
• ✓
  pass: Content type is text/xml

  Accepted. (RadioDNS's own guide shows 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 (3.1)

  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: 36 services in the file
• ✓
  pass: Station found: Baltimore

  Matched on bearer fm:8a0.8f9d.09590
• ✓
  pass: Short name: WWIN-FM
• ✓
  pass: Medium name: Baltimore
• i
  info: No long name

  Optional.
• ✓
  pass: Short description present

  Baltimore
• i
  info: No long description

  Optional (up to 1200 characters).
• i
  info: No keywords

  Optional.
• i
  info: No links

  Optional: a website or contact link.
• !
  warn: No <radiodns> element

  What to do: Add <radiodns fqdn="r1dns.com" serviceIdentifier="..."/> so receivers can find your other RadioDNS services.

5. Logos

• !
  warn: Not all five standard logo sizes are listed

  Missing: 32x32, 112x32

  What to do: RadioDNS asks for either no logos or at least the five standard sizes, so every receiver finds one that fits.
• !
  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.
• ✕
  fail: 2 of 3 logos have problems

  See the table below.

  What to do: Every logo URL must return a real PNG or JPEG of the declared size.

Preview	Declared	Actual	Size	Result
–	?	?	0 B	HTTP 404 http://r1dns.com/logos/WWWIN-FM_32x32.png
	?	112x32	2,304 B	OK http://r1dns.com/logos/WWIN-FM_112x32.png
–	128x128	600x600	662,870 B	real size differs from the declared 128x128; 663 kB (under 50 kB recommended) http://r1dns.com/logos/WWIN-FM_600x600.png

6. Transmitters and streams

• ✓
  pass: FM bearer fm:8a0.8f9d.09590

  cost 10
• !
  warn: Stream OK: https://r1-streams.s3.amazonaws.com/bal/wwin/wwinfm.m3u8

  application/vnd.apple.mpegurl
  The file says application/x-mpegURL but the stream answers application/vnd.apple.mpegurl.
  The bearer has no bitrate.
  No offset set (optional): if the stream runs behind the broadcast, an offset in milliseconds lets receivers line the two up.