Neat idea.
For some reason I thought this might be for calibrating cartridge alignment. If someone can come up with an easier way to correct that it would be amazing.
Show HN: I made a free app to calibrate your turntable by simply playing a song
151–160 of 239 posts
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#152Earlier quoted context omitted.
Are there really "standard" BPM? As far as I know, most music production is just "whatever tempo the band feels like playing." I haven't been in a recording studio, though, so maybe a use of a metronome is more common there?
In some countries there are legal and illegal BPMs, e.g. according to [0] only the BPM range from 80 to 116 is legal in Chechnya. [0] https://www.npr.org/2024/04/09/1243632570/chechnya-music-ban...
That moment when you read the first half of a sentence and know it's clearly sarcasm, and then you finish the sentence and realize it's not... :(
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#153Earlier quoted context omitted.
So many recordings (especially before 2000) seem to be sped up a little. I can’t tell by listening to the song but when you try to play along with a guitar, it sounds terrible. Sometimes it helps to find a live version on YouTube.
Correct. That was often done when mastering with tape. Record at one speed, playback at another to make it sound more "lively." There are songs that were sped up that way anywhere from 25 to 40 cents. It's another reason why live music so often doesn't sound like the recording. When using digital mastering, you can also adjust the playback speed, but you can correct the shift. You get more "liveliness" without the sh…
I could swear the music video version of Evil by Interpol is faster than the album version, but it’s just inconvenient enough to verify that I haven’t bothered
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#154Just put a record on yesterday and my wife said it was playing too fast. I thought she was wrong, then I see this post today! I grabbed the app and gave it a go, 3.5% too fast according to your app. Now I have to figure out how to adjust the damn thing. Really appreciate a free nonsense free app. update: youtube to the rescue. pretty common affordable turntable( Audio-Technica LP60), so I figure I would put the vid l…
I'd be curious to know _why_ your wife felt it was playing too fast. Was it out of tune, out of tempo or something else?
She is musically inclined and she popped on a record I had recently gifted her of one of her favorite bands. She was in marching band her entire high school experience as well. She always finds stuff like this. She recognizes when it’s a different recording or not the “proper version” from her childhood. It all sounds fine to me! As a visual person, the finer understandings of music might as well be magic to me.
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#155this is very cool! Just tried this on my TT (Pro-Ject Carbon Debut EVO) and got a perfect 33 1/3 and had to brag
thanks for making this, and in general I love digital experiences that match with analog media, please keep making more and lmk if you want any free ideas
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#156This seems really clever -- kudos! I'm curious how it actually works? At first I assumed you were comparing the vinyl track to the reference digital track from some streaming service and either analyzing the frequencies with FFT or the timing of peaks. But I watched your demo video and you don't need to tell it anything about the song. Which makes me think you're rather doing an FFT and simply trying to match how wel…
ShazamKit, from that fetch the BPM, BPM detection from the mic, compare ?
"Grooved does not use any third party library or API, just the built-in components provided by Apple."
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#157Just put a record on yesterday and my wife said it was playing too fast. I thought she was wrong, then I see this post today! I grabbed the app and gave it a go, 3.5% too fast according to your app. Now I have to figure out how to adjust the damn thing. Really appreciate a free nonsense free app. update: youtube to the rescue. pretty common affordable turntable( Audio-Technica LP60), so I figure I would put the vid l…
good to know about the adjustment screws. I would have tried having the turntable straddle two piles of books or some such arrangement so that I could adjust the setting in real-time from below the turntable while getting the speed display from the phone.
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#158This is a neat idea. I don't know why it needs to be an app on a phone though. I guess you "know" a phone has a microphone and the setup is minimal and you have a api for everything? It being a phone app leads me to believe the 'no data collected' bit is temporary as all phone apps eventually gobble data to sell. I have an Android so I can't try this out, as its in 'private beta' on Android currently. Would love to s…
Probably a smart idea to be suspicious of new apps, though I will say I am someone who care deeply about privacy. You can take a look at my previous project Boop ( https://boop.okat.best/ ), which is open source and has been on the App Store for 6 years, yet I still don't have any analytics or data collection in it. I have no clue how many people use it beyond download figures I get from Apple. I have considered maki…
You are the Boop author!? Awesome!
I use it and it's very handy. Thanks for creating useful no-nonsense tools!
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#159Earlier quoted context omitted.
All turntables have wow. Wow is determined by the rotational speed. So if you measure 33.2326 wow oscillations per minute, you can know the turn table is a touch too fast. Wow would not be used to measure the error, it would be used to measure the absolute speed. Getting the error from that point is trivial.
I don't think you could use FFT or similar to reliably measure wow to anywhere near the accuracy necessary to produce a reliable amount of correction from just a few seconds of an arbitrary LP. If you were using an LP with a known pure 440 hZ sine wave that you could lock onto exactly, then sure. That's kind of how frequency modulation -- FM radio -- works. But I really don't see how you could do this with songs that…
[deleted]
Re: Show HN: I made a free app to calibrate your turntable by simply playing a song
#160Earlier quoted context omitted.
All turntables have wow. Wow is determined by the rotational speed. So if you measure 33.2326 wow oscillations per minute, you can know the turn table is a touch too fast. Wow would not be used to measure the error, it would be used to measure the absolute speed. Getting the error from that point is trivial.
I don't think you could use FFT or similar to reliably measure wow to anywhere near the accuracy necessary to produce a reliable amount of correction from just a few seconds of an arbitrary LP. If you were using an LP with a known pure 440 hZ sine wave that you could lock onto exactly, then sure. That's kind of how frequency modulation -- FM radio -- works. But I really don't see how you could do this with songs that…
Maybe the distortion in the physical disk has some type of signature, and it can be determined whether that distortion is fast or slow.
For ex, I would bet that 2x intended speed isn’t simply 2x every frequency in the FFT, when played through vinyl on a physical turntable.
Maybe some collection of distortion signals based on disk manufacturing and turntable manufacturing.