{"id":19995,"date":"2021-01-27T01:16:06","date_gmt":"2021-01-27T06:16:06","guid":{"rendered":"https:\/\/reactivemusic.net\/?p=19995"},"modified":"2021-01-30T00:44:26","modified_gmt":"2021-01-30T05:44:26","slug":"max8radio-project","status":"publish","type":"post","link":"https:\/\/reactivemusic.net\/?p=19995","title":{"rendered":"Max8radio project"},"content":{"rendered":"<p>New version of software define radio for Max\/MSP\u00a0 (in progress)<\/p>\n<p>github repository:\u00a0<a href=\"https:\/\/github.com\/tkzic\/max8radio\">https:\/\/github.com\/tkzic\/max8radio<\/a><\/p>\n<h3>Notes<\/h3>\n<h4>goals and strategy<\/h4>\n<p>The new approach will be to remove most of the device handling code from Max. Instead providing device interfaces from existing device libraries, like soapy-sdr, hamlib, gnu-radio, etc., The Max portion of the project will read IQ files, perform DSP, and other magic.<\/p>\n<p>The first platform will be Max8 in Mac OS Catalina<\/p>\n<h4>projects<\/h4>\n<h5>Max + CubicSDR + hamlib<\/h5>\n<p>See working prototype below. This setup uses CubicSDR as a device driver to send IQ data into Max&#8217;s input audio stream. CubicSDR supports many devices via soapySDR. It supports networked rig control via Hamlib.<\/p>\n<p>Advantages of this system: It works now. It runs in Windows. It runs over the a local network. The software is managed and distributed by somebody else.<\/p>\n<p>Disadvantages: Its not an elegant solution &#8211; ie., not self contained within Max. It requires installation and setup of CubicSDr. The software is managed and distributed by somebody else &#8211; so it could stop working at any time.<\/p>\n<h5>rx_tools + hamlib<\/h5>\n<p>rx_tools is an update of some of the rtl tools, like rtl_fm. It includes soapySDR device support. If hamlib is added to rx_tools, then you could do the same networked frequency control, and IQ streaming as CubicSDR &#8211; using rigctld. Without the overhead of running CubicSDR. The downside it that it&#8217;s yet another program to maintain and distribute.<\/p>\n<p>Next step: look at source code for rx_tools and estimate scope of hamlib intergration.<\/p>\n<h5>openwebrx and websdr API<\/h5>\n<p>openwebrx\u00a0\u00a0<a href=\"https:\/\/www.openwebrx.de\/\">https:\/\/www.openwebrx.de\/<\/a><\/p>\n<p>Websdr\u00a0\u00a0<a href=\"http:\/\/websdr.org\/\">http:\/\/websdr.org\/<\/a><\/p>\n<p>These sites provide access to SDR devices connected to web servers. Although they don&#8217;t stream IQ data, it would be interesting to build a Max front end to the APIS.<\/p>\n<h4>background information<\/h4>\n<p>See previous posts:<\/p>\n<ul>\n<li>Generic realtime SDR IQ converter: <a href=\"https:\/\/reactivemusic.net\/?p=19802\">https:\/\/reactivemusic.net\/?p=19802<\/a><\/li>\n<li>Installing Hamlib:\u00a0<a href=\"https:\/\/reactivemusic.net\/?p=19402\">https:\/\/reactivemusic.net\/?p=19402<\/a><\/li>\n<li>Installing CubicSDR:\u00a0<a href=\"https:\/\/github.com\/cjcliffe\/CubicSDR\/releases\">https:\/\/github.com\/cjcliffe\/CubicSDR\/releases<\/a><\/li>\n<li>Supported CubicSDR devices: <a href=\"https:\/\/reactivemusic.net\/?p=19746\">https:\/\/reactivemusic.net\/?p=19746<\/a><\/li>\n<\/ul>\n<h3>External programs required<\/h3>\n<ul>\n<li>hamlib (macports)<\/li>\n<li>cubicSDR (see link above)<\/li>\n<li>netcat (nc) (built into Mac OS terminal)<\/li>\n<\/ul>\n<h3>notes on rigctld commands<\/h3>\n<p>Best results using one letter commands with single quotes:<\/p>\n<pre class=\"p1\"><span class=\"s1\">echo 'F 7023000' | nc -w 1 localhost 4532<\/span><\/pre>\n<p>Prepend &#8216;+&#8217; for more feedback, like this:<\/p>\n<pre class=\"p1\"><span class=\"s1\">% echo '+F 7023000' | nc -w 1 localhost 4532<\/span>\r\n<span class=\"s1\">set_freq: 7023000<\/span>\r\n<span class=\"s1\">RPRT 0<\/span>\r\n<\/pre>\n<h3>Latest prototypes<\/h3>\n<p>Links to latest working projects (from newest to oldest)<\/p>\n<ul>\n<li>1\/30\/2021: Max + CubicSDR using python to send frequency data: <a href=\"https:\/\/reactivemusic.net\/?p=20029\">https:\/\/reactivemusic.net\/?p=20029<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>First Max test project<\/h3>\n<p>This is an update of the test done with CubicSDR and RTLSDR as described here:\u00a0<a href=\"https:\/\/reactivemusic.net\/?p=19802\">https:\/\/reactivemusic.net\/?p=19802<\/a><\/p>\n<p>CubicSDR is great but eventually the goal is to pare down the interface between the SDR device and Max. Something like a command line IQ filter would be ideal:\u00a0 <a href=\"https:\/\/github.com\/xmikos\/simplesoapy\">https:\/\/github.com\/xmikos\/simplesoapy<\/a><\/p>\n<h4>Hardware and system setup<\/h4>\n<p>This test uses an Airspy Discovery HF+, but any device supported in CubicSDR should work &#8211; that&#8217;s the point of this exercise.<\/p>\n<p>Using BlackHole from Existential Audio\u00a0<a href=\"https:\/\/existential.audio\/blackhole\/\">https:\/\/existential.audio\/blackhole\/<\/a><\/p>\n<p>as an alternative to Soundflower to route the IQ (audio stream) data from CubicSDR to Max. You could also use a cable to connect output of one audio device to input of another, etc.,<\/p>\n<p>Signal path:<\/p>\n<p>Antenna -&gt; Airspy -&gt; CubicSDR -&gt; rigctld -&gt; Max<\/p>\n<h4>CubicSDR settings<\/h4>\n<ul>\n<li>Plug in Airspy device before launching CubicSDR, so it will be discovered on the setup screen<\/li>\n<li>On the main display, click just to the right of the mode buttons to bring up a drop down menu of audio devices<\/li>\n<li>select I\/Q mode<\/li>\n<li>select the audio device, or &#8220;BlackHole 2ch&#8221;, that you will use to route audio to Max<\/li>\n<li>click on any of the frequency digits, press space, and enter in the same frequency as the Center Frequency (e.g., 7000000)<\/li>\n<li>click the \u2018V\u2019 to the left of the frequency digits, to select \u2018delta lock mode\u2019. This causes the frequency and center frequency to sync.<\/li>\n<li>Be careful not to click anywhere in the waterfall window \u2013 or this will mess up the sync<\/li>\n<li>Under Rig Control menu:\n<ul>\n<li>Select \u201cHamlib NET rigctl\u201d as the model<\/li>\n<li>Enter localhost:4532 as the control port<\/li>\n<li>Select 57600 as the serial rate<\/li>\n<li>Make sure that \u201cfollow rig\u201d and \u201cfloating center\u201d are checked<\/li>\n<li>After you get the rigctld daemon started, come back here and \u2018Check\u2019 \u2018enable rig\u2019. If it doesn\u2019t stay checked, then there is a problem with the connection.<\/li>\n<\/ul>\n<\/li>\n<li>Under the Audio sample rate menu, select the correct sample rate for your audio device (e.g. 96k)<\/li>\n<\/ul>\n<p>Notes: It seems there is some kind of AGC hardwired into CubicSDR.\u00a0 <a href=\"https:\/\/github.com\/cjcliffe\/CubicSDR\/issues\/826\">https:\/\/github.com\/cjcliffe\/CubicSDR\/issues\/826<\/a><\/p>\n<h4>TCP and rigctld settings<\/h4>\n<ul>\n<li>Open a terminal window<\/li>\n<li>type: rigctld -m 1 4532 &amp;<\/li>\n<li>This starts the server running in the background using the HAMLIB test dummy rig<\/li>\n<li>to set frequency to 7.010 MHz, type:\n<p class=\"p1\"><span class=\"s1\">echo \u2018F 7010000\u2019 | nc -w 1 localhost 4532<\/span><\/p>\n<\/li>\n<li>This should change the center frequency and frequency in CubicSDR<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19807\" src=\"https:\/\/secureservercdn.net\/50.62.88.172\/pnl.2cb.myftpupload.com\/wp-content\/uploads\/2017\/03\/Screen-Shot-2017-03-20-at-10.29.20-PM-300x69.png\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/secureservercdn.net\/50.62.88.172\/pnl.2cb.myftpupload.com\/wp-content\/uploads\/2017\/03\/Screen-Shot-2017-03-20-at-10.29.20-PM-300x69.png 300w, https:\/\/secureservercdn.net\/50.62.88.172\/pnl.2cb.myftpupload.com\/wp-content\/uploads\/2017\/03\/Screen-Shot-2017-03-20-at-10.29.20-PM-768x178.png 768w, https:\/\/secureservercdn.net\/50.62.88.172\/pnl.2cb.myftpupload.com\/wp-content\/uploads\/2017\/03\/Screen-Shot-2017-03-20-at-10.29.20-PM-1024x237.png 1024w, https:\/\/secureservercdn.net\/50.62.88.172\/pnl.2cb.myftpupload.com\/wp-content\/uploads\/2017\/03\/Screen-Shot-2017-03-20-at-10.29.20-PM.png 1470w\" alt=\"\" width=\"300\" height=\"69\" \/><\/p>\n<h4>Max settings<\/h4>\n<p>For this test, you can use any of the MaxSDR tutorials available\u00a0 at\u00a0<a href=\"https:\/\/github.com\/tkzic\/max8radio\">https:\/\/github.com\/tkzic\/max8radio<\/a><\/p>\n<p>We&#8217;ll be using maxsdr7a.maxpat<\/p>\n<p>ignore the max-console messages about missing externals.<\/p>\n<p>The key is to choose the default audio input device and set it to be the same as what is coming out of CubicSDR.\u00a0 ie., &#8220;BlackHole 2ch&#8221;<\/p>\n<ul>\n<li>Set the audio input device to match CubicSDR, as described above. Also match the sample rate (e.g., 96k)<\/li>\n<li>Set the audio output device to your internal soundcard\/speakers<\/li>\n<li>Start audio and recall preset 1 or some normal settings for SSB<\/li>\n<li>It should be receiving I\/Q data now from Cubic SDR<\/li>\n<li>Note: may need to flip the I\/Q input due to anomaly in CubicSDR.<\/li>\n<li>Now load another Max patch to do the frequency control: rigctld1.maxpat<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20000\" src=\"https:\/\/reactivemusic.net\/wp-content\/uploads\/2021\/01\/Screen-Shot-2021-01-27-at-1.48.13-AM-300x138.png\" alt=\"\" width=\"300\" height=\"138\" srcset=\"https:\/\/reactivemusic.net\/wp-content\/uploads\/2021\/01\/Screen-Shot-2021-01-27-at-1.48.13-AM-300x138.png 300w, https:\/\/reactivemusic.net\/wp-content\/uploads\/2021\/01\/Screen-Shot-2021-01-27-at-1.48.13-AM-1024x471.png 1024w, https:\/\/reactivemusic.net\/wp-content\/uploads\/2021\/01\/Screen-Shot-2021-01-27-at-1.48.13-AM-768x353.png 768w, https:\/\/reactivemusic.net\/wp-content\/uploads\/2021\/01\/Screen-Shot-2021-01-27-at-1.48.13-AM-1536x707.png 1536w, https:\/\/reactivemusic.net\/wp-content\/uploads\/2021\/01\/Screen-Shot-2021-01-27-at-1.48.13-AM-2048x942.png 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>This patch sends frequency data to the rigctld daemon via the [shell] object. You can change the frequency using the number box.<\/p>\n<p>That&#8217;s about it for now.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>New version of software define radio for Max\/MSP\u00a0 (in progress) github repository:\u00a0https:\/\/github.com\/tkzic\/max8radio Notes goals and strategy The new approach will be to remove most of the device handling code from Max. Instead providing device interfaces from existing device libraries, like soapy-sdr, hamlib, gnu-radio, etc., The Max portion of the project will read IQ files, perform &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/reactivemusic.net\/?p=19995\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Max8radio project&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[230,21,28,332],"tags":[345,243],"class_list":["post-19995","post","type-post","status-publish","format-standard","hentry","category-development","category-dsp","category-maxmsp","category-radio-2","tag-maxmsp","tag-software-defined-radio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Max8radio project - reactive music<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/reactivemusic.net\/?p=19995\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Max8radio project - reactive music\" \/>\n<meta property=\"og:description\" content=\"New version of software define radio for Max\/MSP\u00a0 (in progress) github repository:\u00a0https:\/\/github.com\/tkzic\/max8radio Notes goals and strategy The new approach will be to remove most of the device handling code from Max. 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