Hacker Public Radio

Continued from hpr2549 :: DVD ripping using old hardware Acquired new user tower, replaced old tower with blown caps Dell Pentium 4 CPU 3.20GHz, 2Gb RAM sudo shred -n 5 -vz /dev/sdX -n, --iterations=N -v, --verbose show progress -z, --zero add a final overwrite with zeros to hide shredding Used same Slackware USB from old tower Used soldering iron from Amazon - Weller WLC100 40-Watt Soldering Station https://www.amazon.com/gp/product/B000AS28UC/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 https://photos.app.goo.gl/VpRxvZLBy49PCo5DA

Previous Music Production Setup Master Tracks Pro: https://en.wikipedia.org/wiki/Master_Tracks_Pro Kawai K4 synthesizer: http://www.polynominal.com/site/studio/gear/synth/kawai-k4/kawai-k4.html Apple GarageBand: https://en.wikipedia.org/wiki/GarageBand Current Music Production Setup Qtractor: https://en.wikipedia.org/wiki/Qtractor JACK: https://en.wikipedia.org/wiki/JACK_Audio_Connection_Kit QJackCtl: https://en.wikipedia.org/wiki/Qjackctl Hydrogen Drum Machine: https://en.wikipedia.org/wiki/Hydrogen_(software) Yoshimi: https://en.wikipedia.org/wiki/Yoshimi_(synthesizer) Amsynth: https://en.wikipedia.org/wiki/Amsynth Fluidsynth: https://en.wikipedia.org/wiki/FluidSynth WhySynth: http://linuxsynths.com/WhySynthBanksDemos/whysynth.html QMidiArp: http://qmidiarp.sourceforge.net/ Hexter: http://linuxsynths.com/HexterPatchesDemos/hexter.html Calf Plugins: https://en.wikipedia.org/wiki/Calf_Studio_Gear Audacity: https://en.wikipedia.org/wiki/Audacity_(audio_editor) Notable Mentions LMMS: https://en.wikipedia.org/wiki/LMMS Linux-oriented Links Debian Ports page: https://www.ports.debian.org Debian Ports PowerPC64: https://wiki.debian.org/PPC64 Fedora: https://getfedora.org

In this show you will learn how to install a bootloader on an Arduino using another Arduino via In-Circuit Serial Programming (ICSP) All credit goes to M-SHORT over at SparkFun for the excellent tutorial. Arduino IDE > File > Examples > 11.ArduinoISP > ArduinoISP Tools > Board > {your board} Tools > Programmer > Arduino as ISP Tools > Burn Bootloader

Further ancillary Bash tips - 11 This is the eleventh episode in the Bash Tips sub-series. It is the third of a group of shows about making decisions in Bash. In the last two episodes we saw the types of test Bash provides, and we looked briefly at some of the commands that use these tests. Now we want to start examining the expressions that can be used in these tests, and how to combine them. We will also start looking at string comparisons in extended tests. Long notes I have provided detailed notes as usual for this episode, and these can be viewed here. Links “GNU BASH Reference Manual” “Bash Conditional Constructs” “Bash Conditional Expressions” “Bourne Shell Builtins” “The set Builtin” “Bash Pattern Matching” “POSIX Shell Command Language” - documentation of all of the POSIX features mentioned in this series. HPR series: Bash Scripting Previous episodes under the heading Bash Tips: HPR episode 1648 “Bash parameter manipulation” HPR episode 1843 “Some Bash tips” HPR episode 1884 “Some more Bash tips” HPR episode 1903 “Some further Bash tips” HPR episode 1951 “Some additional Bash tips” HPR episode 2045 “Some other Bash tips” HPR episode 2278 “Some supplementary Bash tips” HPR episode 2293 “More supplementary Bash tips” HPR episode 2639 “Some ancillary Bash tips - 9” HPR episode 2649 “More ancillary Bash tips - 10” Resources: Examples: bash11_ex1.sh, bash11_ex2.sh, bash11_ex3.sh, bash11_ex4.sh, bash11_ex5.sh

HPR Chat with Al Al asks Dave a number of questions about podcast audio recording and post-production. Al is thinking of doing National Podcast Post Month in November National Podcast Post Month (or NaPodPoMo) is a challenge in a similar vein to National Novel Writing Month (or NaNoWriMo) in which participants are challenged to produce and publish a piece of audio as a podcast, every day for the month of November. Bad podcast audio Audio quality is as important as the content that's being presented. Bad audio is going to be what causes new podcasters the most damage in subscriber numbers. An example of good audio is the true crime podcast, One Eye Open, which Dave started listening to a couple of weeks ago. He also picked up a couple of other true crime podcasts as a result of listening to One Eye Open where the audio quality is so bad, that they can't be heard! Loudness is a measurement of how loud something is perceived to be. Levelling is a process of ensuring that individual tracks in a podcasts are an an equivalent level, but also the podcast overall is at an equivalent level to other podcasts that have been levelled the same way. Our setups Al and Dave have a very similar microphone setup. Samson Q2U - XLR and USB capable microphone Pop filters and wind screens Boom arm Shock mount What is a compressor The non-technical definition is that it brings up the quiet bits and brings down the louder bits so that your voice has less of a variance if you shout or whisper. Different microphone types Cardioid - focuses on sounds coming from in front of the mic Omnidirectional - can theoretically pick up sound from all directions Dynamic - well suited for vocal use Condenser - overall better quality sound than dynamic, but more susceptible to background noise, so requires a really quiet studio environment Your level You can measure your own level in Audacity - make sure you stay in the green! If you stray into yellow or even red, either lower your level or move slightly away from the mic. Other people's levels Concentrate on your own, get others to manage theirs. If you're recording multiple tracks, it can be managed in post-production, but once it's been merged into a single track it's virtually impossible. File formats FLAC/ALAC - lossless formats MP3/OGG/M4A - lossy formats Record in a lossless format, and do your edits and post-production in a lossless format. Only transcode to a lossy format once you're ready to publish your final file. Monitoring If you're recording yourself, and you don't want to hear yourself through headphones, take the headphones off. If you're recording with someone else who is not in the same room, you are better off hearing yourself through your headphones at the same level as the person you're talking to. Post-production Use Audacity to:

Now, this is not a doom and gloom lecture. Actually it is a talk about what is going to happen in the next 30 years. It is a talk about what is called “postcapitalism”. It is a talk about how almost all jobs are going to disappear due to automation. But also how we are going to think about this this and come up with solutions. It talks about the three big challenges we need to face. And yes, this involves you as well!

Radio Mode and frequency controls on Amateur HF Radio TS940S UK HF band plan information http://rsgb.org/main/operating/band-plans/hf/ Morse code (CW), Carrier Wave https://en.wikipedia.org/wiki/Morse_code Article about Sideband, including Lower Side Band (LSB) and Upper Side Band (USB) https://en.wikipedia.org/wiki/Sideband Amplitude Modulation (AM) https://en.wikipedia.org/wiki/Amplitude_modulation Frequency Modulation (FM) https://en.wikipedia.org/wiki/Frequency_modulation Frequency Shift Keying (FSK) Note the CW ident di da dit or dot dash dot is not as I thought the letter “K” in Morse code, silly me, it’s actually the letter “R”. Told you I wasn’t great at Morse. https://en.wikipedia.org/wiki/Frequency-shift_keying The “T-F Set” button is used to set the Transmit frequency when working in split mode. In split mode, you can set the radio to transmits on one frequency and receives on a different frequency.

The last of my personal health issue shows covers two related issues, Sleep Apnea and Atrial Fibrillation. They are related because Sleep Apnea is a cause of Atrial Fibrillation. Fortunately both can be controlled if you follow medical directions. https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631 http://www.heart.org/en/health-topics/atrial-fibrillation/what-is-atrial-fibrillation-afib-or-af https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631 https://www.palain.com/?page_id=352

Crepe Recipe: 1 cup of flour 1 cup of milk 1 egg 1 pinch of salt Cinnamon Sugar Mixture Recipe: 1 part cinnamon (or less) 8 parts sugar

The function looks like =EXACT(A1,D1) and its purpose is to tell you if A1 contains the exact same value as D1 or not.

This is the final interview from this years Makefest in Liverpool. In this interview I interview one of the founder members of Makefest, Caroline Keep, and the Head Teacher of the school where she works, John Carling. https://lpoolmakefest.org/

New hosts Welcome to our new host: Jeroen Baten. Last Month's Shows Id Day Date Title Host 2631 Mon 2018-09-03 HPR Community News for August 2018 HPR Volunteers 2632 Tue 2018-09-04 Liverpool Makefest 2018 - interviews with Robert and Carl Tony Hughes AKA TonyH1212 2633 Wed 2018-09-05 Elm - First Impressions tuturto 2634 Thu 2018-09-06 Git tag and metadata klaatu 2635 Fri 2018-09-07 Running your own mainframe on Linux (for fun and profit) Jeroen Baten 2636 Mon 2018-09-10 Liverpool Makefest 2018 - interviews with Noel from JMU FabLab Tony Hughes AKA TonyH1212 2637 Tue 2018-09-11 Convert it to Text b-yeezi 2638 Wed 2018-09-12 Dirt cheap Magic klaatu 2639 Thu 2018-09-13 Some ancil

The pocket knife Shane talks about is the Number 6 knife made by the French company Opinel, It costs about $20 (Canadian). This version has a walnut handle.

More ancillary Bash tips - 10 Making decisions in Bash This is my tenth contribution to the Bash Scripting series under the heading of Bash Tips. The previous episodes are listed below in the Links section. We are currently looking at decision making in Bash, and in the last episode we examined the tests themselves. In this episode we’ll look at the constructs that use these tests: looping constructs, conditional constructs and lists of commands. Note: this episode and the preceding one were originally recorded as a single episode, but because it was so long it was split into two. As a consequence the audio contains references to examples such as bash9_ex2.sh where the true name is bash10_ex1.sh. The notes have been updated as necessary but not the audio. Long notes I have provided detailed notes as usual for this episode, and these can be viewed here. Links “GNU BASH Reference Manual” “Bash Looping Constructs” “Bash Conditional Constructs” “Bourne Shell Builtins” HPR series: Bash Scripting Previous episodes under the heading Bash Tips: HPR episode 1648 “Bash parameter manipulation” HPR episode 1843 “Some Bash tips” HPR episode 1884 “Some more Bash tips” HPR episode 1903 “Some further Bash tips” HPR episode 1951 “Some additional Bash tips” HPR episode 2045 “Some other Bash tips” HPR episode 2278 “Some supplementary Bash tips” HPR episode 2293 “More supplementary Bash tips” HPR episode 2639 “Some ancillary Bash tips - 9” Resources: Examples: bash10_ex1.sh, bash10_ex2.sh, bash10_ex3.sh

Yes, this talk is about running your own mainframe on your own hardware. Mainframes are old, yes, but they are still very much alive. New hardware is still being developed and there are a lot of fresh jobs in this area too. A lot of mainframes run COBOL workloads. COBOL is far from a dead language. It processes an estimated 85% of all business transactions, and 5 billion lines of new COBOL code are written every year. In this session the speaker will help you in take your first steps towards running your own mainframe. If you like then after this session you can continue to build your knowledge of mainframe systems using the links provided during the talk. Come on in and learn the basics of a completely different computer system! And it will take you less than an hour to do that!