{"id":506,"date":"2014-01-16T18:12:39","date_gmt":"2014-01-16T10:12:39","guid":{"rendered":"http:\/\/outrecording.com\/?p=506"},"modified":"2026-01-19T12:54:57","modified_gmt":"2026-01-19T04:54:57","slug":"tascam-dr-680-noise-test","status":"publish","type":"post","link":"https:\/\/www.outrecording.com\/tw\/tascam-dr-680-noise-test\/","title":{"rendered":"Tascam DR-680 Noise Test"},"content":{"rendered":"<p class=\"qtranxs-available-languages-message qtranxs-available-languages-message-tw\">Sorry, this entry is only available in <a href=\"https:\/\/www.outrecording.com\/en\/wp-json\/wp\/v2\/posts\/506\" class=\"qtranxs-available-language-link qtranxs-available-language-link-en\" title=\"English\">English<\/a><\/p>A <a href=\"https:\/\/www.gearslutz.com\/board\/remote-possibilities-in-acoustic-music-and-location-recording\/889971-tascam-dr680-opinions-alternatives.html\" target=\"_blank\" rel=\"noopener\">recent discussion<\/a> over at gearslutz opened my eyes to a major problem (for me) of my Tascam DR-680: Unacceptable phantom power noise at higher gain. I have the Busman Mod, which lowers the overall noise of the unit. However, according to a poster in that thread, the mod won&#8217;t make much of a difference until you&#8217;ve sorted out the phantom power noise problem. After reading that post, I immediately did some testing.<\/p>\n<p>One thing I had noticed a while back was that some channels had more noise than others at a very high gain. The noise wasn&#8217;t uniform-sounding across all channels. Channel 4 in particular was making a far more noticeable noise.<\/p>\n<p>For me, that&#8217;s a big deal. In an ambisonic recording, if one channel is putting out more noise (or a different type of noise) than the others, then it very well may show in the final decoded sound. That&#8217;s evident in the recording below.<\/p>\n<p>Testing phantom power noise was as simple as turning up the gain and flicking it on and off. Of course with no mic plugged in. You can hear a stark difference when turned on and off <em>at a HIGH GAIN<\/em>.<\/p>\n<p>I&#8217;m not particularly disappointed in this as compromises need to be made when designing a box like this for such a low price. You get what you pay for. And for many people, this wouldn&#8217;t be a problem at all. This problem is certainly nothing a good external phantom power box can&#8217;t fix, or a mod, as described <del>in this thread<\/del>. (forum is dead)<\/p>\n<p>I had considered those two options, but first I wanted to find out just how much noise the preamps were making. I took a recent outdoor recording that needed high amounts of gain and used RX2 to remove the preamp and phantom power noise. <strong><em>It&#8217;s hardly scientific or conclusive<\/em><\/strong>, as I recorded each input with the same amount of gain and with nothing connected, and made a noise profile out of that. But it was revealing nonetheless.<\/p>\n<p>Here are my unscientific recordings of both. Download the WAV files and put them in your DAW and jump back and forth between them. You can clearly hear the difference. I&#8217;ve increased the gain digitally by about 20db to illustrate. Notice the right channel has more noise than the left. That probably has to do with my extra noisy channel 4. I&#8217;m not using that channel for the moment.<\/p>\n<p style=\"text-align: center;\">DR-680 Phantom Power &amp; Preamp Noise:<\/p>\n<!--[if lt IE 9]><script>document.createElement('audio');<\/script><![endif]-->\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-1\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Phantom_Power__Preamp_Noise.mp3?_=1\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Phantom_Power__Preamp_Noise.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Phantom_Power__Preamp_Noise.mp3<\/a><\/audio>\n<p style=\"text-align: center;\">DR-680 Denoised:<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-2\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Denoised.mp3?_=2\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Denoised.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Denoised.mp3<\/a><\/audio>\n<p style=\"text-align: center;\"><strong>Download<\/strong><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Phantom_Power__Preamp_Noise.rar\">Tascam_DR-680_Phantom_Power_&amp;_Preamp_Noise<\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/Tascam_DR-680_Denoised.rar\">Tascam_DR-680_Denoised<\/a><\/p>\n<h1 style=\"text-align: center;\"><span style=\"color: #ff9900;\">Preamp Test<\/span><\/h1>\n<p>At this point I&#8217;ve decided I need to make a change so I can record with less noise. For a lot of what I record it won&#8217;t be a problem. But there are plenty of times when I need to bring the gain up to a higher level. I strongly considered buying a pair of <a href=\"http:\/\/www.core-sound.com\/2Phant\/1.php\">Core Sound 2phant<\/a> phantom power boxes. But I have no idea if these will truly solve my problem. I&#8217;m sure they&#8217;ll work great, but what if my current preamps are <em>STILL<\/em> too noisy for my taste? I don&#8217;t want to throw my money away. And the thought of opening up my DR-680 and modding it doesn&#8217;t sit well with me. So&#8230;<\/p>\n<p>Maybe an external preamp (with phantom power) is the solution. The only problem is, there aren&#8217;t a heck of a lot of products out there that fit what I need: 4 Channels, Phantom Power, Stepped Gain, Battery Powered and <em><strong>inexpensive<\/strong><\/em>. Soundfield actually does make a preamp (the SMP200) designed for the SPS200, but for some wild reason it&#8217;s AC powered only.<\/p>\n<p>After some searching, I&#8217;ve found the <a href=\"https:\/\/www.rme-audio.de\/en\/products\/quadmic.php\">RME Quadmic<\/a>. It fits the bill perfectly in every area <em>EXCEPT <\/em><strong><em>stepped gain<\/em><\/strong>!<\/p>\n<p><a href=\"https:\/\/outrecording.com\/wp-content\/uploads\/2014\/01\/quadmic.jpg\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-519\" src=\"https:\/\/outrecording.com\/wp-content\/uploads\/2014\/01\/quadmic.jpg\" alt=\"quadmic\" width=\"260\" height=\"125\"><\/a><\/p>\n<p>At its price point, I can&#8217;t overlook it. So what I decided to do is see what kind of noise I might be dealing with if I used an external preamp into the DR-680&#8217;s Line inputs. I&#8217;ve read that the Line inputs might have less noise. At any rate, sharing the gain stage could prove less noisy.<\/p>\n<p>From several reviews, the Quadmic is a low noise preamp with non-noisy phantom power at high gain. I felt I could use a similar preamp that I have on hand to get an idea of what to expect. For this purpose I used my John Hardy M-1. On paper they look very similar in terms of noise. 129 dBu EIN @ 150 Ohm. Of course that&#8217;s only on paper and I could be reading everything wrong. But hey, this is just a personal test.<\/p>\n<p>For my test I used a Gefell M930 inside my vocal booth into the M1 and into the DR-680&#8217;s Line in. I tried a few different gain structures to see which would yield the lowest noise. As sort of a baseline, I first recorded M930&gt;M1&gt;Lynx Aurora converter. I figured the noise present in this chain should be what I&#8217;m shooting for at a minimum.<\/p>\n<p>Here are the different combinations I set up:<\/p>\n<p>M930, M1=+60, Lynx Aurora<\/p>\n<p>M930, M1=+60, DR680 Line=0<\/p>\n<p>M930, M1=+30, DR680=Line+30<\/p>\n<p>M930, M1=+40, DR680, Line=+20<\/p>\n<p>M930, DR680=mic pres MAX<\/p>\n<p>&nbsp;<\/p>\n<p>And the results&#8230; (using headphones is more revealing)<\/p>\n<p>&nbsp;<\/p>\n<p>1. M930, M1=+60, Lynx Aurora&nbsp; &nbsp; &nbsp;&nbsp;<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-3\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B60-Lynx-Aurora.mp3?_=3\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B60-Lynx-Aurora.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B60-Lynx-Aurora.mp3<\/a><\/audio>\n<p>2. M930, M1=+60, DR680 Line=0&nbsp; &nbsp;<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-4\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B60-DR680-Line0.mp3?_=4\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B60-DR680-Line0.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B60-DR680-Line0.mp3<\/a><\/audio>\n<p>3. M930, M1=+30, DR680=Line+30&nbsp;<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-5\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B30-DR680Line%2B30.mp3?_=5\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B30-DR680Line%2B30.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B30-DR680Line%2B30.mp3<\/a><\/audio>\n<p>4. M930, M1=+40, DR680, Line=+20<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-6\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B40-DR680-Line%2B20.mp3?_=6\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B40-DR680-Line%2B20.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-M1%2B40-DR680-Line%2B20.mp3<\/a><\/audio>\n<p>5. M930, DR680=mic pres MAX&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-506-7\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-DR680MIC-pres-MAX.mp3?_=7\" \/><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-DR680MIC-pres-MAX.mp3\">https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/M930-DR680MIC-pres-MAX.mp3<\/a><\/audio>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><strong>24bit 96k Download<\/strong><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/field-recordings.b-cdn.net\/2014-01-16-DR680\/DR680_noise_test.rar\">DR680_noise_test<\/a><\/p>\n<h2 style=\"text-align: center;\"><span style=\"color: #ff9900;\">Impressions<\/span><\/h2>\n<p>From what I&#8217;m hearing, #4 sounds like the lowest amount of noise from the group. But not much difference from #3. According to the stats in Nuendo, there&#8217;s a negligible difference.<\/p>\n<p>Surprisingly, whether I use the Aurora or the DR680, there&#8217;s not much of a difference. (#1 &amp; 2) Somehow I thought #1 would hands down be better than #2.<\/p>\n<p>I threw #5 in there for fun. Not sure if it&#8217;s fair to compare Line vs Mic inputs, but the noise difference is crazy.<\/p>\n<p>&nbsp;<\/p>\n<p>In conclusion, I believe adding an external preamp with the DR-680 is the way to go. (DUH!) If the Quadmic performs as well as the hype, then I should lower my noise floor considerably and at a very reasonable cost. I&#8217;ll just need to take the time to manually set the level on each channel so they are spot on. Then figure out a way to protect them so they don&#8217;t move. Another possibility I&#8217;m researching is to put stepped gain pots of the Quadmic.<\/p>\n<p>Let me finally add that the above testing is for me and only me that I thought I&#8217;d share with you. I don&#8217;t have an anechoic chamber to test in and my &#8220;procedures&#8221; may be flawed. But if you&#8217;re curious what to expect out of the Tascam DR-680 with Busman mod, then this may provide some insight. Please email me with any problems you see. I&#8217;ll be happy to test again.<\/p>\n<p>And that&#8217;s my disclaimer&#8230; :)","protected":false},"excerpt":{"rendered":"<p>Sorry, this entry is only available in EnglishA recent  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":507,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[42,28,1274],"tags":[40,35,62,63,64,65,31],"class_list":["post-506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-equipment","category-field-recording","category-1274","tag-ambisonics","tag-busman","tag-john-hardy-m1","tag-lynx-aurora","tag-phantom-power","tag-quadmic","tag-tascam-dr680"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tascam DR-680 Noise Test - OutRecording<\/title>\n<meta name=\"description\" content=\"A very unscientific noise test of the Tascam DR-680 (with Busman mod)\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.outrecording.com\/tw\/tascam-dr-680-noise-test\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tascam DR-680 Noise Test - 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My wife and I operate a voice recording studio in Kaohsiung, Taiwan. We\u2019re both voice actors, so getting into this business came naturally to us. I had originally started this blog to chronicle my field recordings; a hobby to help me get out of the studio. As fate would have it, one day I found myself in the mountains on a rocky trail while looking for a place to record. My scooter couldn\u2019t handle the rough conditions so I continued on foot. This eventually led to me purchasing a dual sport motorcycle \u2013 two in fact. Slowly my field recordings became less and less until I was riding off-road exclusively. This has led to many great adventures that I decided to share here. Hiking seemed a natural extension to the off-roading for me. Many hiking trails begin at the end of a motorcycle trail. So I would often follow them on foot, wondering where they would take me. I didn\u2019t want to forget these hiking trips, so I decided to write about them here. Hopefully they\u2019ll be interesting and helpful to you. Since my first peak, JiuBaoShan \u2013 \u4e45\u4fdd\u5c71 in April of 2018, I\u2019ve hiked to nearly 70 peaks in Taiwan and had a ton of adventures! Taiwan is such a great country to hike. I\u2019m really lucky to have chosen here to live. I was a brand ambassador for Six Moons Designs as part of their 2020 and 2021 International Ambassador Team. They make lightweight, high quality, affordable backpacking equipment. I\u2019m really excited to be a part of their team. Riding and hiking in Taiwan\u2026that\u2019s what you\u2019ll get in this blog!\",\"sameAs\":[\"https:\/\/www.outrecording.com\",\"https:\/\/www.facebook.com\/Outrecording\",\"https:\/\/www.instagram.com\/outrecording\/\",\"https:\/\/x.com\/https:\/\/twitter.com\/OutRecording\",\"https:\/\/www.youtube.com\/channel\/UCEpnFu3gi2xynEvrF3KbQtw\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Tascam DR-680 Noise Test - OutRecording","description":"A very unscientific noise test of the Tascam DR-680 (with Busman mod)","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.outrecording.com\/tw\/tascam-dr-680-noise-test\/","og_locale":"zh_TW","og_type":"article","og_title":"Tascam DR-680 Noise Test - OutRecording","og_description":"A very unscientific noise test of the Tascam DR-680 (with Busman mod)","og_url":"https:\/\/www.outrecording.com\/tw\/tascam-dr-680-noise-test\/","og_site_name":"OutRecording","article_publisher":"https:\/\/www.facebook.com\/Outrecording","article_author":"https:\/\/www.facebook.com\/Outrecording","article_published_time":"2014-01-16T10:12:39+00:00","article_modified_time":"2026-01-19T04:54:57+00:00","og_image":[{"width":694,"height":400,"url":"https:\/\/www.outrecording.com\/wp-content\/uploads\/2014\/01\/DR-680_stock.jpg","type":"image\/jpeg"}],"author":"Glenn","twitter_card":"summary_large_image","twitter_creator":"@https:\/\/twitter.com\/OutRecording","twitter_site":"@OutRecording","twitter_misc":{"\u4f5c\u8005:":"Glenn","\u9810\u4f30\u95b1\u8b80\u6642\u9593":"6 \u5206\u9418"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["Article","BlogPosting"],"@id":"https:\/\/www.outrecording.com\/tascam-dr-680-noise-test\/#article","isPartOf":{"@id":"https:\/\/www.outrecording.com\/tascam-dr-680-noise-test\/"},"author":{"name":"Glenn","@id":"https:\/\/www.outrecording.com\/#\/schema\/person\/0ab412d08a28190757d45cc3714c548d"},"headline":"Tascam DR-680 Noise Test","datePublished":"2014-01-16T10:12:39+00:00","dateModified":"2026-01-19T04:54:57+00:00","mainEntityOfPage":{"@id":"https:\/\/www.outrecording.com\/tascam-dr-680-noise-test\/"},"wordCount":1298,"commentCount":11,"publisher":{"@id":"https:\/\/www.outrecording.com\/#\/schema\/person\/0ab412d08a28190757d45cc3714c548d"},"image":{"@id":"https:\/\/www.outrecording.com\/tascam-dr-680-noise-test\/#primaryimage"},"thumbnailUrl":"https:\/\/www.outrecording.com\/wp-content\/uploads\/2014\/01\/DR-680_stock.jpg","keywords":["Ambisonics","Busman","John Hardy M1","Lynx Aurora","Phantom Power","Quadmic","Tascam DR680"],"articleSection":["Equipment","Field Recording","\u91ce\u5916\u9304\u97f3"],"inLanguage":"zh-TW","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.outrecording.com\/tascam-dr-680-noise-test\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.outrecording.com\/tw\/tascam-dr-680-noise-test\/","url":"https:\/\/www.outrecording.com\/tw\/tascam-dr-680-noise-test\/","name":"Tascam DR-680 Noise Test - 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My wife and I operate a voice recording studio in Kaohsiung, Taiwan. We\u2019re both voice actors, so getting into this business came naturally to us. I had originally started this blog to chronicle my field recordings; a hobby to help me get out of the studio. As fate would have it, one day I found myself in the mountains on a rocky trail while looking for a place to record. My scooter couldn\u2019t handle the rough conditions so I continued on foot. This eventually led to me purchasing a dual sport motorcycle \u2013 two in fact. Slowly my field recordings became less and less until I was riding off-road exclusively. This has led to many great adventures that I decided to share here. Hiking seemed a natural extension to the off-roading for me. Many hiking trails begin at the end of a motorcycle trail. So I would often follow them on foot, wondering where they would take me. I didn\u2019t want to forget these hiking trips, so I decided to write about them here. Hopefully they\u2019ll be interesting and helpful to you. Since my first peak, JiuBaoShan \u2013 \u4e45\u4fdd\u5c71 in April of 2018, I\u2019ve hiked to nearly 70 peaks in Taiwan and had a ton of adventures! Taiwan is such a great country to hike. I\u2019m really lucky to have chosen here to live. I was a brand ambassador for Six Moons Designs as part of their 2020 and 2021 International Ambassador Team. They make lightweight, high quality, affordable backpacking equipment. I\u2019m really excited to be a part of their team. Riding and hiking in Taiwan\u2026that\u2019s what you\u2019ll get in this blog!","sameAs":["https:\/\/www.outrecording.com","https:\/\/www.facebook.com\/Outrecording","https:\/\/www.instagram.com\/outrecording\/","https:\/\/x.com\/https:\/\/twitter.com\/OutRecording","https:\/\/www.youtube.com\/channel\/UCEpnFu3gi2xynEvrF3KbQtw"]}]}},"_links":{"self":[{"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/posts\/506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/comments?post=506"}],"version-history":[{"count":23,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/posts\/506\/revisions"}],"predecessor-version":[{"id":16888,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/posts\/506\/revisions\/16888"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/media\/507"}],"wp:attachment":[{"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/media?parent=506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/categories?post=506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.outrecording.com\/tw\/wp-json\/wp\/v2\/tags?post=506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}