{"id":946,"date":"2022-06-14T01:30:04","date_gmt":"2022-06-14T00:30:04","guid":{"rendered":"http:\/\/www.thelemmingfarm.uk\/?p=946"},"modified":"2022-06-14T01:30:07","modified_gmt":"2022-06-14T00:30:07","slug":"we-have-audio","status":"publish","type":"post","link":"http:\/\/www.thelemmingfarm.uk\/?p=946","title":{"rendered":"We have Audio!"},"content":{"rendered":"\n<p>As a completely frivolous addition to the robot we wanted it to &#8220;talk&#8221;. By talk we mean issue Lemming sound effects! Previous jobs involved adding an amplifier to the pi. This challenge was to write some code that allowed a sound to be played from within Python.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p>It definitely sounds like the original!<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 2224 \/ 1080;\" width=\"2224\" controls src=\"http:\/\/www.thelemmingfarm.uk\/wp-content\/uploads\/2022\/06\/20220614_011936_1.mp4\"><\/video><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">import simpleaudio as sa\r\nimport wave\r\n\r\nwave_read = wave.open(path_to_file, 'rb')\r\naudio_data = wave_read.readframes(wave_read.getnframes())\r\nnum_channels = wave_read.getnchannels()\r\nbytes_per_sample = wave_read.getsampwidth()\r\nsample_rate = wave_read.getframerate()\r\n\r\nplay_obj = sa.play_buffer(audio_data, num_channels, bytes_per_sample, sample_rate)\r\nplay_obj.wait_done()<\/code><\/pre>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p>To achieve this we used <a href=\"https:\/\/simpleaudio.readthedocs.io\/en\/latest\/simpleaudio.html#simpleaudio.WaveObject.play\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">SimpleAudio <\/a>from with python using something like this code. This was taken from the manual page of simpleaudio<\/p>\n\n\n\n<p>One of the challenges was that the original lemming sound effects used some weird sample frequencies which are not supported by the pi. After playing them and comparing with the following <a href=\"https:\/\/simpleaudio.readthedocs.io\/en\/latest\/capabilities.html\" target=\"_blank\" rel=\"noreferrer noopener\">list<\/a> the closest approximation was used and hardcoded for that sample.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>As a completely frivolous addition to the robot we wanted it to &#8220;talk&#8221;. By talk we mean issue Lemming sound effects! Previous jobs involved adding<\/p>\n","protected":false},"author":1,"featured_media":948,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-946","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>We have Audio! - The Lemming Farm<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.thelemmingfarm.uk\/?p=946\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"We have Audio! - The Lemming Farm\" \/>\n<meta property=\"og:description\" content=\"As a completely frivolous addition to the robot we wanted it to &#8220;talk&#8221;. 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