hpr-knowledge-base/hpr_transcripts/hpr4584.txt

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)

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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
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