{"id":10223,"date":"2017-03-27T08:30:03","date_gmt":"2017-03-27T15:30:03","guid":{"rendered":"http:\/\/crimeandtheforcesofevil.com\/blog\/?p=10223"},"modified":"2017-03-27T00:05:15","modified_gmt":"2017-03-27T07:05:15","slug":"lets-listen-to-an-rk-47-microphone","status":"publish","type":"post","link":"https:\/\/crimeandtheforcesofevil.com\/blog\/2017\/03\/27\/lets-listen-to-an-rk-47-microphone\/","title":{"rendered":"let&#8217;s listen to an rk-47 microphone!"},"content":{"rendered":"<p>Build reports are nice enough. (<a href=\"https:\/\/crimeandtheforcesofevil.com\/blog\/2017\/03\/26\/a-bit-of-errata-for-the-rk-47-build-report\/\">I wrote up a little errata post yesterday, by the by<\/a>.) But the real question, of course, is <Em>how does the RK-47\/990B kit mic sound?<\/em><\/p>\n<p>Early impressions are surprisingly good. Even with only the single microphone, there&#8217;s a sense of presence and space &#8211; even with a purely mono signal path &#8211; that I normally have to dual-mic to attain. Also, it has tremendous precision &#8211; this is a mic capable of great subtlety. And the amount of gain built into the microphone itself is crazy &#8211; this is one spicy meatball of a microphone. That&#8217;s something you won&#8217;t hear in recordings, but it results in a lower noise floor, which is always good.<\/p>\n<p>Let&#8217;s start with some unsubtle differences, ones that&#8217;ll show up on laptop speakers. Because while I&#8217;ve never liked the MXL-990, they sell a zillion of &#8217;em, and we should make a couple of direct comparisons.<\/p>\n<p>Here&#8217;s a snippet of chords from &#8220;Lukey,&#8221; alternating between the MXL-990 (unaltered factory) and the RK-47\/990B. It starts with the MXL-990, then transitions in-song to the RK-47, then back and forth. It ends with the RK-47. It&#8217;s a pure mono signal path until prepped for uploading to Soundcloud.<\/p>\n<p><iframe loading=\"lazy\" width=\"100%\" height=\"120\" scrolling=\"no\" frameborder=\"no\" src=\"https:\/\/w.soundcloud.com\/player\/?url=https%3A\/\/api.soundcloud.com\/tracks\/314173234&amp;color=ff5500&amp;auto_play=false&amp;hide_related=true&amp;show_comments=true&amp;show_user=true&amp;show_reposts=false\"><\/iframe><\/p>\n<p>And here&#8217;s a short melody, on zouk &#8211; again, starting on MXL-990 (factory stock), then RK-47, then back to MXL-990. The last phrase is repeated to allow us to end on the RK-47; also, I wanted that ending bit to be presented on both microphones. The glissando really highlights some of the differences.<\/p>\n<p><iframe loading=\"lazy\" width=\"100%\" height=\"120\" scrolling=\"no\" frameborder=\"no\" src=\"https:\/\/w.soundcloud.com\/player\/?url=https%3A\/\/api.soundcloud.com\/tracks\/314174685&amp;auto_play=false&amp;hide_related=true&amp;show_comments=true&amp;show_user=true&amp;show_reposts=false&amp;visual=true\"><\/iframe><\/p>\n<p>But that&#8217;s shooting fish in a barrel, as it were. The MXL-990, while popular, is <em>not<\/em> a good microphone. We should do comparisons to microphones I actually <em>like<\/em> &#8211; let&#8217;s say, the M-Audio Nova. At about twice the price of the MXL-990, it&#8217;s still a cheap microphone, just one I consider entry-level competent. But it has issues &#8211; not the least of which being it&#8217;s kind of a noisy beast as these categories of microphones go.<\/p>\n<p>So let&#8217;s take the easy swing &#8211; here&#8217;s a sharply boosted noise level comparison of the RK-47 to the M-Audio Nova, at equivalent gain levels. This is <b>not<\/b> the noise you&#8217;d actually hear; I recorded a silent room at gain appropriate on each microphone for instrument recording, then cranked that recording up 32db for easy noise levels comparison.<\/p>\n<p>Unfortunately, this really requires headphones, because it&#8217;s RK-47 on left, Nova on right:<\/p>\n<p><iframe loading=\"lazy\" width=\"100%\" height=\"120\" scrolling=\"no\" frameborder=\"no\" src=\"https:\/\/w.soundcloud.com\/player\/?url=https%3A\/\/api.soundcloud.com\/tracks\/314172313&amp;color=ff5500&amp;auto_play=false&amp;hide_related=true&amp;show_comments=true&amp;show_user=true&amp;show_reposts=false\"><\/iframe><\/p>\n<p><B>NOT SUBTLE<\/B>. But also, an easy shot. The Nova is noisy and everybody knows it. There are some mods out there to improve that, but they change the sound a bit in ways I don&#8217;t like, so I work with it.<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/solarbird.net\/Livejournal\/2017-03\/rk47\/rk47-top-nova-bottom-close.gif\" alt=\"comparison of waveforms\" style=\"float:right; margin:0 0 20px 20px;\">So let&#8217;s dig down a bit. Pictured here is a snippet of waveform from a bit of music played, in mono, over my studio monitors, into identically positioned microphones relative to those speakers. These two recordings were made simultaneously.<\/p>\n<p>You&#8217;ll note in this highly-zoomed-in render how the RK47 waveform remains clear and unmuddled in these extremely rapid changes, while the Nova&#8217;s blurs into a bit of a mush. That&#8217;s the sort of thing I&#8217;m talking about, and also, the sort of thing you can hear in these <Em>very short<\/em> snippets of horns from a jazz track. This comparison <em>requires<\/em> headphones, possibly good ones:<\/p>\n<ul>\n<li><a target=\"_blank\" href=\"https:\/\/dl.dropboxusercontent.com\/u\/48493064\/blog-2017\/2017-03-horncomp-nova-2017-03-23-12-02.wav\">M-Audio Nova, WAV file, 16 bit\/44.1khz (CD quality, 160Kb total)<\/a>\n<li><a target=\"_blank\" href=\"https:\/\/dl.dropboxusercontent.com\/u\/48493064\/blog-2017\/2017-03-horncomp-rk47-2017-03-23-12-02.wav\">Micparts RK-47\/990B, WAV file, 16 bit\/44.1khz (CD quality, 160Kb total)<\/a><\/ul>\n<p>They&#8217;re short because they must be uncompressed for best comparison &#8211; sorry about that &#8211; but listen to them a few times and compare. Note how the edges of detail &#8211; bits which add flavour &#8211; are blurred in the Nova, but retained in the RK-47. Neat, eh?<\/p>\n<p>That out of the way, let&#8217;s step up a level in comparator microphones. Oktava 012s are considered very good affordable microphones, particularly strong in their price ranges, and street for a new 012 and one pickup is comparable to the cost of this kit. With a second head (to add a second pickup pattern, as this mic has), it&#8217;s a bit more. They&#8217;re small-can capacitor instrument mics, rather than large-can, but we&#8217;re doing instrument recording, so that&#8217;s fair. The components inside &#8211; particularly older ones picked up used &#8211; can be a bit dodgy, but the design is great and the pickups are great, and you can upgrade the iffy capacitors and the suspect transistor if necessary. <a href=\"https:\/\/crimeandtheforcesofevil.com\/blog\/2016\/11\/01\/mod-report-oktava-mk-012mc-012-microphone\/\">I have, of course, done this with mine<\/a>.<\/p>\n<p>Here&#8217;s the intro to &#8220;King of Elfland&#8217;s Daughter,&#8221; on the Oktava 012 (upgraded components) and the RK-47\/990B kit. This recording repeats phrases, with the Oktava 012 first, then the RK-47\/990B. Pure mono signal path, identical recording setup made within a few minutes of each other, but <em>not<\/em> simultaneously, as you can&#8217;t put two microphones in exactly the same place and I wanted the most equal comparison I could, modulo performance limitations. This probably also requires headphones, as the 012 is a pretty darned precise microphone itself:<\/p>\n<p><iframe loading=\"lazy\" width=\"100%\" height=\"120\" scrolling=\"no\" frameborder=\"no\" src=\"https:\/\/w.soundcloud.com\/player\/?url=https%3A\/\/api.soundcloud.com\/tracks\/314569883&amp;color=ff5500&amp;auto_play=false&amp;hide_related=true&amp;show_comments=true&amp;show_user=true&amp;show_reposts=false\"><\/iframe><\/p>\n<p><a href=\"https:\/\/dl.dropboxusercontent.com\/u\/48493064\/blog-2017\/on-soundcloud-also\/oktava012-vs-rk47-from-soundhole-012-first-2017-03-25.wav\">44.1khz\/16-bit uncompressed WAV file version here<\/a>.<\/p>\n<p>Once again, I&#8217;m finding that the RK-47 has a real staging advantage. There&#8217;s a sense of in-the-room presence with the RK-47 that I can make happen by dual-miking with my other microphones and mixing down, but <em>not<\/em> directly in mono.<\/p>\n<p>Now, I don&#8217;t want to leave the impression that it is BEST AT ALL THINGS, because it&#8217;s not. These aren&#8217;t the only recordings I made &#8211; they&#8217;re just ones that show differences best. The first example I found was mandolin &#8211; the Nova likes my mandolin better than the RK-47 does. The specific response behaviour and foibles of the Nova work in its favour; a single RK-47 may have more presence and precision than a single Nova, but the Nova recording sounded more <Em>musical<\/em> just the same. I&#8217;m sure there will be other examples as well.<\/p>\n<p>In the end, I think this will probably become a heavy-use microphone in my kit. It may even become my go-to mic on the zouk &#8211; I need to do some stereo and multi-distance comparisons before I will know that for sure, but it&#8217;s looking very good. I also like what it does with piccolo and flute. I haven&#8217;t done any playing around with fiddle or drums, and one thing I want to play with is a two-mic setup with the ribbon kit mic I built, to see how those behave together &#8211; it&#8217;s a mic placement technique I&#8217;ve wanted to try for a while, but have never got round to testing. Now is probably the time.<\/p>\n<p>I kind of wish I&#8217;d ordered the matched-pair version of this microphone kit. But it would&#8217;ve cost twice as much and I couldn&#8217;t know in advance I&#8217;d like it this much, so.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Build reports are nice enough. (I wrote up a little errata post yesterday, by the by.) But the real question, of course, is how does the RK-47\/990B kit mic sound? Early impressions are surprisingly good. Even with only the single microphone, there&#8217;s a sense of presence and space &#8211; even with a purely mono signal [&#038;hellip<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,11],"tags":[],"class_list":["post-10223","post","type-post","status-publish","format-standard","hentry","category-diy","category-recording-gear"],"_links":{"self":[{"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/posts\/10223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/comments?post=10223"}],"version-history":[{"count":21,"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/posts\/10223\/revisions"}],"predecessor-version":[{"id":10255,"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/posts\/10223\/revisions\/10255"}],"wp:attachment":[{"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/media?parent=10223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/categories?post=10223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/crimeandtheforcesofevil.com\/blog\/wp-json\/wp\/v2\/tags?post=10223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}