Update metadata and transcripts through end of July 2026

Refreshed episodes/hosts/comments/series from hpr.sql, and added
official HPR transcripts for the 180 episodes aired since the last
sync (hpr4516-hpr4695).

hpr_transcripts/hpr4584.txt

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+Episode: 4584
+Title: Recording a show, and crappy audio
+Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr4584/hpr4584.mp3
+Transcribed: 2026-07-31 16:14:30 (official HPR transcript)
+
+---
+
+This is Hacker Public Radio Episode 4584, for 2026-02-26
+Today's show is entitled, "Recording a show, and crappy audio"
+The host is Archer72 and the duration is 00:07:24
+The flag is Clean, and the license is CC-BY-SA
+The summary is "Archer72 demonstrates 3 forms of microphones, some better than others."
+hello this is archer 72 for hacker public radio in this episode it is kind of a
+tongue-in-cheek episode it was made mentioned by someone that I might have
+crappy audio on the earpiece that I was using for the new years of
+you show so I wanted to test that theory against my standard microphone and a
+couple of earpieces to see how they sound when I refer to my standard
+microphone it is the zoom H1 essential and is attached to a arm that is
+bolted to the table of my next to my bed and is connected by a USB to the
+computer the zoom H1 essential is listed as a compact 32-bit audio
+recorder no leveling is required thanks to a 32-bit float converter
+technology stereo recording and playback and it is in wave BMF or IXML
+format maximum recording quality is 32-bit or 90 and 96 kilohertz as a
+built-in XY stereo microphone maximum sound pressure level is 120
+decibels max is barrier free for people with visual impairments thanks to
+acoustic instructions via the built-in speaker or headphone output has an
+OLED display built-in speaker recording medium is micro SDHC cards up to 32
+gigabytes or micro SDXC cards up to its one-terabyte operates as a USB
+microphone on Mac PC iOS or an Android power supply is two AAA batteries
+or a zoom AD 17 power adapter or USB-C port a stereo mic line input with a
+3.5 millimeter jack stereo line headphone output is also a 3.5 millimeter
+jack and the way is 92 grams the two earbuds that I am going to test use
+open air technology which directs the speaker pointed at your ear canal
+instead of your traditional earbud which goes into your ear canal
+and now recording on the Tozo O2 earbud and for purposes of testing
+we'll be good to use the microphone article on Wikipedia
+a microphone colloquial I'm gonna mess this up colloquially called a mic is a
+transducer that converts sound into electrical signal microphones are used in
+telecommunications sound recording broadcasting and consumer electronics including
+telephones hearing aids and mobile devices several types of microphones are used
+today which employ different methods to convert the air pressure variations of
+a sound wave to an electrical signal the most common are the dynamic microphone
+which uses a coil of wire suspended in a magnetic field the condenser microphone
+which uses the vibrating diagram as a capacitor plate and the contacts microphone
+which uses a crystal of PZO PZO electric material microphones typically need to be
+connected to a preample fire before the signal can be recorded or reproduced
+the second of the two ear buds that I am testing are the sound core 29 and I want to
+do my test sample as continuing in Wikipedia as a under-history to speak to larger
+groups of people need a rose to increase the volume of the human voice there
+earliest devices used to achieve this were acoustic megapombs some of the first
+examples from fifth century BC Greece or theater masks with farm shaped mouth openings
+that acoustically amplified the voice of actors and amplipators between 1964 and
+sorry I got that wrong on between 1664 and 1685 the English forever
+this is English physicist Robert Hook was a first experiment with a medium other than
+air with the invention of an early telephone made of stretch wire with a cup attached to the
+gen today this is known as the tin cantilephone in 1856 the Italian inventor and Tonyo
+Mucci developed a dynamic microphone based on a generation of electric current by moving
+a coil of wire to various depths of an omega field this method of modulation was also a lasting
+method for the analogy of the telephone speaking of this device mucci row in 1857 it consists of a
+vibrating diaphragm and electrified magnet with a spiral wire that wraps around it the vibrating
+diaphragm alter is the current of the magnet these alterations of current transmitted to the other
+end of the wire create an agos vibrations of of the receiving diaphragm and reproduce the word
+now i'm back on the zoom mic and the last source of audio recording that i'm not going to
+demonstrate here is the exit audio recorder which i've mentioned before in previous episodes
+which is not on after all anymore i don't not sure how i've got taken out of the after our store
+what there are two ways to get it and one is straight from good help which would be an a key
+APK side load pile or the other is obtaining and i'll leave the instructions in the show notes
+not all these sources were the best of quality but at least they lowered the barriers to entry
+and leave you to be able to record to do a show of your own
+this has been archer 72 feel free to leave comments on this show or any other
+bye
+You have been listening to the Hacker Public Radio podcast, at hackerpublicradio.org.
+Today's show was contributed by a HPR listener like yourself.
+If you ever thought of recording a podcast, then visit the HPR site to find out how easy it really is.
+Hosting for HPR has been kindly provided by anhonesthost.com, the Internet Archive, rsync.net, and the HPR Community Content Delivery Network.
+Unless otherwise stated, today's show is released under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.