{"id":91,"date":"2014-09-27T21:32:31","date_gmt":"2014-09-27T21:32:31","guid":{"rendered":"http:\/\/www.mixedbymarcmozart.com\/?p=91"},"modified":"2015-12-11T14:37:42","modified_gmt":"2015-12-11T13:37:42","slug":"diy-acoustic-room-measurement-in-10-minutes-how-to","status":"publish","type":"post","link":"https:\/\/mixedbymarcmozart.com\/es\/2014\/09\/27\/diy-acoustic-room-measurement-in-10-minutes-how-to\/","title":{"rendered":"DIY Acoustic Room Measurement in 10 minutes + free Test Tones!"},"content":{"rendered":"<p>How to do\u00a0a simple acoustic room measurement in your home studio or listening room &#8211; in 10 minutes or less!<br \/>\nAnybody can do this &#8211; all you need is\u00a0a computer connected to a pair of speakers.<br \/>\nThis will give you a head start into solving your room acoustic issues, and I&#8217;ll also tell you more about\u00a0my favourite resources once you&#8217;re ready to dig deeper.<\/p>\n<p>Here&#8217;s\u00a0a YouTube-clip with test tones I&#8217;ve created with Logic Pro &#8211; it\u00a0works almost the same\u00a0in\u00a0Protools, Cubase, Garageband, Fruity Loops, Reason.<br \/>\nYou can playback\u00a0this clip to do the test I&#8217;m describing below, if you want to skip setting this up in your DAW.<\/p>\n<p>Be careful &#8211; this clip starts with subsonic frequencies you won&#8217;t hear in most rooms!<br \/>\nIn about 47 seconds you will know how shitty your room sounds. Just listen and let me know if the volume of the test tone is perfectly consistent?<\/p>\n<p><iframe loading=\"lazy\" title=\"DIY Acoustic Room Measurement in 10 minutes!\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/8Olibnhhm7A?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"text-decoration: underline;\"><strong>1. Find a test tone generator in your DAW software.<br \/>\n<\/strong><\/span>Most DAWs come with an oscillator or test tone generator for\u00a0creating a basic sine-tone (if in doubt, google \u201etest tone generator daw\u201c + the name of your software).<br \/>\nThe frequency of the oscillator can be set. (You can\u00a0also use a synth playing a sine-wave, <a href=\"http:\/\/en.wikipedia.org\/wiki\/Piano_key_frequencies\" target=\"_blank\">THIS LIST<\/a>\u00a0shows the range of notes needed)<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>2. Turn the volume of your speakers fully down.<br \/>\n<\/strong><\/span>&#8230;to not destroy the\u00a0speakers or\u00a0your ears, as test tone generators can produce some nasty high tones! (which we don&#8217;t need for what we&#8217;re doing today)<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>3. Set the test tone generator\u00a0(or synth) up.<br \/>\n<\/strong><\/span>In Logic Pro, for example, the oscillator can be inserted as a plug-in, in any track or even output.<br \/>\nSet the output level of the test tone to -18dB\u00a0and start with a frequency of 100Hz (G2 on a\u00a0keyboard).<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>4. Turn\u00a0your speakers\u00a0up slowly, until you can <em>just<\/em> hear the low 100Hz tone clearly.<br \/>\n<\/strong><\/span>Do not turn it up too much &#8211; at a low volume\u00a0it will be easier for you to notice changes in level, which will be important.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>5. Bring the frequency of the oscillator down, slowly &#8211; step by step.<br \/>\n<\/strong><\/span>Take your time, change the frequency gradually from 100Hz down to the lowest available frequency, but take a minute to do that.<\/p>\n<p><strong><em>Notice how the level of the tone keeps changing? On some frequencies the signal might seem to disappear completely, on others it\u2019s louder than the original 100Hz tone.<\/em><\/strong><\/p>\n<p>If you are listening on small speakers, the tone will disappear completely when you reach a certain frequency, this could be around 40\/50Hz if you don&#8217;t have a subwoofer. Keep going down to perhaps 20Hz, even if you don\u2019t hear the tone any more.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>6. Take notes of\u00a0what you hear.<\/strong><\/span><br \/>\nI&#8217;m now explaining you how to write down what we hear. Finish reading the\u00a0rest of this article before you start. It&#8217;s quick and easy but there are a few steps involved.<br \/>\nStarting with a\u00a0test tone\u00a0of\u00a020Hz, we will gradually move up\u00a0the frequencies\u00a0&#8211; and make notes\u00a0about how we hear the volume changing.<br \/>\nWe take notes using the simple categories<br \/>\n<strong>\u00abNO TONE\u00bb<\/strong><br \/>\n&#8211; you don&#8217;t hear a test tone<br \/>\n<strong>\u00abLOW\u00bb<\/strong><br \/>\n&#8211; you can hear it, but it&#8217;s lower than the average<br \/>\n<strong>\u00abNORMAL\u00bb<\/strong><br \/>\n&#8211; the average level of the test tone throughout all frequencies<br \/>\n<strong>\u00abHIGH\u00bb<\/strong><br \/>\n&#8211; when it&#8217;s louder than average<\/p>\n<p>Click on the\u00a0chart below and print it out.<br \/>\n(the left arrow going up shows the level you are hearing, the arrow in the middle going to the right is for the frequency of the test tone, starting at 20Hz, going up to 293Hz)<\/p>\n<p><a href=\"http:\/\/www.mixedbymarcmozart.com\/wp-content\/uploads\/2014\/09\/room_measurement_LQ.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-92 size-large\" src=\"https:\/\/mixedbymarcmozart.cdnport.com\/2022\/04\/Q0MhG1S2-room_measurement_LQ-1024x724.jpg\" alt=\"Simple Room Measurement Chart Empty\" width=\"474\" height=\"334\" \/><\/a>Once you have printed the chart (you could\u00a0draw this in 2min if you don&#8217;t have a printer close by), start going up with the frequency from 20Hz all the way to 300Hz, and make corresponding little\u00a0crosses on your printed chart.<br \/>\nThe only slight challenge is that you have to look at your computer screen to see the current test tone frequency displayed in the test tone generator, while making a subjective judgement of the perceived volume.<\/p>\n<p>Here is an example on\u00a0how the chart of my own test looked:<\/p>\n<p><a href=\"http:\/\/www.mixedbymarcmozart.com\/wp-content\/uploads\/2014\/09\/room_measurement_dots_large.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-93 size-large\" src=\"https:\/\/mixedbymarcmozart.cdnport.com\/2022\/04\/3PUNyZmq-room_measurement_dots_large-1024x725.jpg\" alt=\"room_measurement_dots_large\" width=\"474\" height=\"335\" \/><\/a>(for example, at 20Hz I heard \u00abNO TONE\u00bb hence the cross on the bottom left, at 130Hz the tone was really \u00abHIGH\u00bb&#8230; you get the idea)<\/p>\n<p>BTW, just in case you are wondering why we won\u2019t go above 300Hz\u2026 the low end spectrum is most important for the overall balance of your room, and it takes a lot more effort to fix this, while getting the mids and treble\u00a0right (in comparison) is almost a trivial task when it comes to room treatment.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>7. Once\u00a0you\u2019re done, connect the dots, and voil\u00e0 &#8211; here&#8217;s\u00a0the low end frequency curve of your room!!<\/strong><\/span><\/p>\n<p><a href=\"http:\/\/www.mixedbymarcmozart.com\/wp-content\/uploads\/2014\/09\/room_measurement_graph.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-95 size-large\" src=\"https:\/\/mixedbymarcmozart.cdnport.com\/2022\/04\/UQMtwuvl-room_measurement_graph-1024x741.jpg\" alt=\"room_measurement_graph\" width=\"474\" height=\"342\" \/><\/a>Note, this is the frequency response at your listening position. The measurement curve can look different by changing your listening position even a few inches. Also, the graph doesn\u2019t tell you anything about the reverb-time of the room which is equally important\u00a0(we&#8217;ll measure\u00a0that in the next part).<\/p>\n<p>For the graph above I did the test in my home office, which is a completely untreated and small square room with a pair of cheap active computer speakers. The results are really bad, the peak at 130Hz\u00a0as well at the notch around 207Hz would make this room a serious headache to mix in.<\/p>\n<p>I would love for all of you to do this test, and post a scan of your measurement\u00a0into the comments, either here or on my <a href=\"https:\/\/www.facebook.com\/mixedbymarcmozart\" target=\"_blank\">Facebook Page<\/a>\u00a0or <a href=\"https:\/\/twitter.com\/marcmozartmixes\" target=\"_blank\">Twitter<\/a>, along with a picture of your room and\/or setup.<\/p>\n<p>Todays measurement was about <span style=\"text-decoration: underline;\"><strong>Level<\/strong><\/span> and <span style=\"text-decoration: underline;\"><strong>Frequency<\/strong><\/span>, in the next post on this topic\u00a0we&#8217;ll talk about\u00a0<span style=\"text-decoration: underline;\"><strong>Reverb Time<\/strong><\/span> (=RT).<br \/>\nYou might be guessing\u00a0it already&#8230;\u00a0those nasty resonances we found\u00a0are reverberating like crazy if we don&#8217;t do anything about them!<\/p>\n<p>In my next post on this topic,\u00a0I will tell you <span style=\"text-decoration: underline;\"><strong>how to tackle these problems<\/strong><\/span>\u00a0without spending a fortune.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Links<\/strong><\/span><br \/>\nAs promised, here&#8217;s a list of my favourite resources on room acoustics for studios.<\/p>\n<p><a href=\"http:\/\/www.roomeqwizard.com\" target=\"_blank\"><b><span style=\"text-decoration: underline;\">Room EQ Wizard Software (Windows, Mac, Linux)<\/span><\/b><\/a><br \/>\nFree room acoustics software for Windows, Mac OS X and even Linux.\u00a0Runs under Java, which took me a moment to to get used to\u00a0on the Mac, but the software did all I needed, and it&#8217;s free.<br \/>\nMac Users: you might need this <a href=\"http:\/\/johnr.hifizine.com\/2013\/02\/room-eq-wizard-on-the-mac-an-input-workaround\/\" target=\"_blank\">workaround<\/a> for your sound card.<br \/>\nNote: to download, you have to register to the\u00a0<a href=\"http:\/\/www.hometheatershack.com\/forums\/\">Home Theater Shack Forums<\/a>.<\/p>\n<p><iframe loading=\"lazy\" title=\"Room EQ Wizard: REW Room Measurement Tutorial\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/e4uSR3cUUSY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><a href=\"http:\/\/supermegaultragroovy.com\/products\/FuzzMeasure\/\" target=\"_blank\">FuzzMeasure (Mac)<\/a><\/strong><\/span><br \/>\nI really like FuzzMeasure. It&#8217;s easy to use and setup, and does everything you need and expect. The full version is $ 150, and there is a free trial version that locks some features after a while.<\/p>\n<p><iframe loading=\"lazy\" title=\"FuzzMeasurePro Review\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/m0JK488Cefw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><a href=\"http:\/\/realtraps.com\" target=\"_blank\">Realtraps<\/a><\/strong><\/span><br \/>\nEthan Winer, the owner of acoustic treatment company Realtraps, has put a great website together that, beyond selling acoustic products, is a great reading resource to get into the topic and includes some great educational videos, like the one below:<\/p>\n<p><iframe loading=\"lazy\" title=\"Modal Ringing and Resonance\" width=\"1200\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/aHkAFSZmMk4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><a href=\"https:\/\/www.gearslutz.com\/board\/studio-building-acoustics\/469574-measuring-room-acoustics.html\">This post on Gearslutz.com<br \/>\n<\/a><\/strong><\/span>on \u00abMeasuring Room Acoustics\u00bb gives you all the details on what\u00a0software like Room EQ Wizard or FuzzMeasure can measure in your room. Great detailed post.<\/p>\n<p><strong>More on this topic soon, and in\u00a0my\u00a0forthcoming book<br \/>\n<\/strong><strong><a href=\"http:\/\/www.mixedbymarcmozart.com\/buy-mixing-books-tutorials\/\" target=\"_blank\">YOUR MIX SUCKS.<\/a>\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to do\u00a0a simple acoustic room measurement in your home studio or listening room &#8211; in 10 minutes or less! Anybody can do this &#8211; all you need is\u00a0a computer connected to a pair of speakers. This will give you a head start into solving your room acoustic issues, and I&#8217;ll also tell you more&hellip;<\/p>\n","protected":false},"author":1,"featured_media":95,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-91","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mixing-advice","category-4","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DIY Acoustic Room Measurement in 10 minutes!<\/title>\n<meta name=\"description\" content=\"How to DIY Acoustic room measurement in 10 minutes using Logic Pro Cubase Protools Fruity Loops Reason free oscillator test tones\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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