Is your station ready for hybrid radio?

What is being checked

• i
  info: KCSM - SAN MATEO, CA

  From the NRSC list: 91.10 MHz, PI code 1728, FCC facility 58913.
• i
  info: RadioDNS lookup name

  09110.1728.1a0.fm.radiodns.org (frequency 91.10 MHz, PI 1728, country code 1a0)

1. RadioDNS registration

• ✓
  pass: Registered

  09110.1728.1a0.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

  381 ms, 261,457 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: KCSM Jazz 91

  Matched on bearer fm:1a0.1728.09110
• ✓
  pass: Short name: KCSM 91
• ✓
  pass: Medium name: KCSM Jazz 91
• ✓
  pass: Long name: KCSM The Bay Area's Jazz Station to the World!
• ✓
  pass: Short description present

  KCSM 91.1FM The Bay Area's Jazz Station
• ✓
  pass: Long description present

  For six decades, listener supported radio station KCSM 91.1 FM has given listeners across the San Francisco Bay Area and the world access to jazz music around the clock, broadcast from the College of San Mateo. KCSM c...
• i
  info: No keywords

  Optional.
• ✓
  pass: 1 link

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

  fqdn radiodns.prss.org, service identifier 00000000000012e2

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.
• i
  info: Logo checks limited

  Only the first logos were fetched.
• ✓
  pass: 12 logos downloaded and checked

Preview	Declared	Actual	Size	Result
	128x128	128x128	3,669 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170521728.png
	220x48	220x48	959 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522508.png
	1024x768	1024x768	34,678 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522490.png
	600x600	600x600	30,324 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522492.png
	160x90	160x90	2,115 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522512.png
	320x240	320x240	10,127 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522502.png
	32x32	32x32	472 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522494.png
	170x170	170x170	5,672 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522498.png
	74x41	74x41	604 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522516.png
	1400x1400	1400x1400	39,959 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522496.png
	86x48	86x48	892 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522514.png
	112x32	112x32	527 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KCSM_Logo_Navy_Gold_600x600_Content_Depot_170522504.png

6. Transmitters and streams

• ✓
  pass: FM bearer fm:1a0.1728.09110

  cost 20
• i
  info: Other bearer: hd:292.0e621

  Not checked by this tool.
• i
  info: Other bearer: hd:292.0e621.2

  Not checked by this tool.
• !
  warn: Stream OK: https://ice26.securenetsystems.net/KCSMHD2

  audio/aac, 64 kbps
  The file says audio/mpeg 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.
• !
  warn: Stream OK: https://ice7.securenetsystems.net/KCSM2

  audio/mpeg, 96 kbps
  The file says 128 kbps but the stream reports 96 kbps.
  No offset set (optional): if the stream runs behind the broadcast, an offset in milliseconds lets receivers line the two up.