{"id":34534,"date":"2018-10-19T07:26:56","date_gmt":"2018-10-19T11:26:56","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=34534"},"modified":"2018-10-19T07:26:56","modified_gmt":"2018-10-19T11:26:56","slug":"stefano-invites-you-to-experiment-with-drm-digital-radio-mondiale-over-ip","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2018\/10\/stefano-invites-you-to-experiment-with-drm-digital-radio-mondiale-over-ip\/","title":{"rendered":"Stefano invites you to experiment with DRM (Digital Radio Mondiale) over IP"},"content":{"rendered":"

\"Photo<\/a><\/p>\n

Many thanks to SWLing Post<\/em> contributor,\u00a0Stefano Mollo (VK6WFM), who writes:<\/p>\n

I have been lately experimenting with DRM 30, with the aim of coming up with a cheap solution to get on air for next to no $$$, for small, local broadcasters that would either go pirate on FM or would not go at all due to the impossibility here in Australia to get a proper FM license at a cost that does not involves selling a kidney (or two)!<\/p>\n

I am a ham radio operator, so I turned my attention to DRM30; [the DRM application] DReaM<\/a> has the capability of acting as a transmitter as well, so I started experimenting.<\/p>\n

Click here to download DReaM via SourceForge.<\/a><\/p>\n

I was very successful at transmitting a DRM30 \/ 10 kHz signal with a $ 0.50 TX module otherwise intended to transmit data with an Arduino. The signal was received with an SDR + HDSDR + Virtual Audio Cable + DReaM in reception mode.<\/p>\n

So far, so good; with this experiment I realised that DRM 30 can, in fact, yield excellent quality at ANY frequency (as I used the 433Mhz LIPD range in my experiment) or better said, with any medium, as long as it is linear enough to transport the DRM signal.<\/p>\n

I wanted to find a way to show the World – literally – what can be achieved with DReaM in TX mode…for free!!!<\/p>\n

So, after some trial and error, I have set up the system below which allows anyone in the World to “tune in” my “DRM30 radio station” and listen to my DRM30\/18 kHz signal, in full blown stereo. Quality is exceptional, and just imagine to send DReaM’s signal to a proper transmitter instead of streaming it over the internet ….<\/p>\n

So…point your VLC Media Player (on Windows)<\/a> to stream from:<\/p>\n

\"\"<\/a><\/p>\n

…then pipe VLC’s output to DReaM’s input via Audio Cable (or any other Virtual Audio Cable you like).<\/p>\n

In DReaM, select the audio cable output as the sound card’s signal input device:<\/p>\n

\"\"<\/a>Then select L+R as Channel:<\/p>\n

\"\"<\/a>Set the sample rate to the highest value:<\/p>\n

\"\"<\/a>One more thing you need to set is the “Channel Estimation: Time Interpolation” parameter to Linear; this is very important!<\/strong><\/em><\/p>\n

\"\"<\/a><\/p>\n

After few seconds you should be able my test signal, in full stereo, streamed from a PC running DReaM in TX mode, whose output is then captured by MB Recaster and streamed to an ICE Cast server I have in the Cloud. Note that no particular configuration was needed on the ICE Cast server, at all.<\/p>\n

This is an example of what can be achieved on a solid transmission channel with DRM30 and only 18 kHz bandwidth (i.e. the normal bandwidth of an AM channel).<\/p>\n

One can achieve the same exact audio quality using any channel linear enough to transport an 18 kHz wide DRM30 signal. It doesn’t matter the frequency, or the physical medium per se.<\/p>\n

[…]My aim with this experiment is not to send DRM over IP; there are much simpler ways or streaming audio over IP.<\/p>\n

Rather, my aim is to demonstrate what can be achieved with 18 kHz +DRM30 on any frequency and on any medium (which, could be for example the electrical distribution overhead lines …. just saying …. \ud83d\ude42 ).<\/p>\n

If only the local regulator would support this, instead of enforcing draconian regulations … such as the restriction of just 6 kHz on shortwave.<\/p>\n

Please share your thoughts.<\/p><\/blockquote>\n

Fascinating experiment, Stefano! Thanks for sharing!<\/p>\n

Post readers: I<\/strong><\/em>f you’re in the mood to do a little experiment, let us know if you’re able to decode Stefano’s 18 kHz DRM30 broadcast over IP!\u00a0 Please comment!<\/p>\n","protected":false},"excerpt":{"rendered":"

Many thanks to SWLing Post contributor,\u00a0Stefano Mollo (VK6WFM), who writes: I have been lately experimenting with DRM 30, with the aim of coming up with a cheap solution to get on air for next to no $$$, for small, local broadcasters that would either go pirate on FM or would not go at all due […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1114,54,627,3],"tags":[980,4083,7367,7366,6164],"class_list":["post-34534","post","type-post","status-publish","format-standard","hentry","category-digital-modes","category-drm","category-how-to","category-news","tag-digital-radio-mondiale","tag-drm","tag-drm-over-ip","tag-drm30","tag-stefano-mollo"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-8Z0","jetpack-related-posts":[{"id":41683,"url":"https:\/\/swling.com\/blog\/2020\/01\/drm30-on-a-smartphone-ktwr-shows-us-the-way\/","url_meta":{"origin":34534,"position":0},"title":"DRM30 on a Smartphone: KTWR Shows Us The Way","author":"Thomas","date":"January 19, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Dan Van Hoy, who writes: [Regarding the reception of DRM via smart phone,] I happened to find this KTWR Guam post about decoding DRM30 with a smart phone, app, and an RTL-SDR: Convert Smart Phone to DRM 30 HF receiver! We are pleased to\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/01\/AACJournalineSDRPhone-768x1024.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/01\/AACJournalineSDRPhone-768x1024.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/01\/AACJournalineSDRPhone-768x1024.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":868,"url":"https:\/\/swling.com\/blog\/2010\/09\/video-over-shortwave-demonstrated-at-ibc\/","url_meta":{"origin":34534,"position":1},"title":"Video Over Shortwave Demonstrated at IBC","author":"Thomas","date":"September 14, 2010","format":false,"excerpt":"(Source: TVB - Television Broadcast) AMSTERDAM: Transmission of video over the shortwave radio topology is being demonstrated at IBC by Fraunhofer. The company rolled out \u201cDiveemo,\u201d a system delivers video via Digital Radio Mondiale, the MPEG-4-based broadcasting technology used in the AM radio band. It was demonstrated today at the\u2026","rel":"","context":"In "DRM"","block_context":{"text":"DRM","link":"https:\/\/swling.com\/blog\/category\/drm\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/drmlogo.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":9323,"url":"https:\/\/swling.com\/blog\/2014\/04\/saba-conference-to-feature-special-drm-broadcast-from-ascension-island\/","url_meta":{"origin":34534,"position":2},"title":"SABA conference to feature special DRM broadcast from Ascension Island","author":"Thomas","date":"April 17, 2014","format":false,"excerpt":"(Source: DRM Consortium via Alokesh Gupta) The DRM Consortium is a Sector Partner at The Southern African Broadcasting Association (SABA), Digital Radio Broadcasting Summit in Cape Town from 22nd \u2013 24th April. The event will include a presentation by the DRM Chair, Ruxandra Obreja, on April 22nd at 11.50am and\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"SABA","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/04\/SABA.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/04\/SABA.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/04\/SABA.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/04\/SABA.jpg?resize=700%2C400 2x"},"classes":[]},{"id":38360,"url":"https:\/\/swling.com\/blog\/2019\/06\/russia-to-test-drm-over-fm\/","url_meta":{"origin":34534,"position":3},"title":"Russia to test DRM over FM","author":"Thomas","date":"June 30, 2019","format":false,"excerpt":"(Source: Radio World via Michael Bird) Russia will begin testing the Digital Radio Mondiale digital radio standard in the FM Band in July in St. Petersburg. Russian firms Digiton and Triada TV are working with Fraunhofer IIS, RFmondial, chipmaker NXP and others to carry out the pilot. The organizers will\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/01\/DRM-DAB-Digital-Radio-Receiver-1024x966.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/01\/DRM-DAB-Digital-Radio-Receiver-1024x966.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/01\/DRM-DAB-Digital-Radio-Receiver-1024x966.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":45450,"url":"https:\/\/swling.com\/blog\/2020\/09\/new-drm-portables-announced-at-ibc-2020\/","url_meta":{"origin":34534,"position":4},"title":"New DRM portables announced at IBC 2020","author":"Thomas","date":"September 19, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Ed, who writes: SWLing Post readers might be interested in reading the Digital Radio Mondiale Newsletter of September 2020, which covers DRM developments announced at IBC 2020. These include DRM transmitter developments and deployments, and lots of new DRM receivers--such as eight (8) AM\/FM\/DRM\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Gospell-DRM-Radios.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Gospell-DRM-Radios.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Gospell-DRM-Radios.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Gospell-DRM-Radios.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":8927,"url":"https:\/\/swling.com\/blog\/2014\/03\/extended-he-aac-drm-to-upgrades-audio-codec\/","url_meta":{"origin":34534,"position":5},"title":"Extended HE-AAC: DRM to upgrades audio codec","author":"Thomas","date":"March 9, 2014","format":false,"excerpt":"Many thanks to SWLing Post reader, Mike, for sharing this news item on RadioInfo: (Source: RadioInfo) The latest upgrade to DRM\u2019s audio codec was demonstrated in a presentation at this week\u2019s\u00a0Digital Broadcasting Symposium\u00a0in Kuala Lumpur.\u00a0 Digital Radio Mondiale (DRM) is the first global broadcast standard to adopt the Extended HE-AAC\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"drmlogo","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/drmlogo.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/34534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=34534"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/34534\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=34534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=34534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=34534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}