Ask Justin Frankel

justin = { main feed , music , code , askjf , pubkey };

Ask Justin Frankel
No reasonable question unanswered since 2009!

Suggested topics: programming, music, sleep, coffee, etc.

Note: please do not ask questions about REAPER features, bugs or scheduling, use the forums instead.

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[older questions]

Question: I tried to use gmem in a lua-script to set a value that I read out the next time I run the script. Like extstates but with gmem. However, the second time I run the script, the attached gmem seems to be cleared and contains only 0. Is this normal behavior or rather a bug?
Asked by Mespotine (37.4.250.x) on August 14 2026, 4:31pm

Question: Is there somewhere a document, that discusses the specs of the .lcf-format of Licecap?
Asked by Mespotine (37.4.250.x) on August 14 2026, 2:51pm

Question: Did you know that lone had a life as a competitive ice skater prior to his life as a programmer (and prior to his life as a blacksmith, haha)? What a fascinating dude.
Asked by `jarsonic (174.53.68.x) on August 14 2026, 1:01pm

Question: Would you ever reveal the number of paying/licensed users? Reddit regularly has posts wondering how Reaper is faring.
Asked by Tony (27.252.77.x) on August 14 2026, 12:46am
Reply on August 14 2026, 1:36am:

nah, but it's plenty for a small company that doesn't spend much money... Comment...

Question: Hello Justin. If you were to start making a codebase now for the long term, would you rely a lot on OS APIs for things that are not really required like GUI programming, or would you implement them more from scratch?
Asked by Afonso (78.137.207.x) on August 10 2026, 9:37pm
Reply on August 12 2026, 3:57pm:

Hard to say, but given how I've spent decades writing stuff on top of the classic win32 API, I'd have to do that now. But if I was just starting out, no idea what I'd use. Comment...

Question: I'm currently implementing oversampling in a VST3 using r8brain free. Is there an advantageous reason why your plugin oversampling in REAPER don't take effect unless you stop playback and replay then the oversampling activates?? Couldn't it have just worked on the fly once the user set the oversampling or is there a downside to doing that way using r8brain?
Asked by oversampling (197.251.240.x) on August 8 2026, 7:56pm
Reply on August 8 2026, 10:45pm:

It simplifies a lot of things to not have it change on the fly. 5 Comments...

Question: On avarage, how much hours per week you work with REAPER related stuff?
Asked by Kronos (98.228.59.x) on August 8 2026, 2:52pm
Reply on August 8 2026, 10:47pm (edited at August 8 2026, 10:51pm):

I dunno probably a regular workweek-ish? But not standard hours, spread out various times.... Comment...

Question: being coerced to make music using digital telepathy caused a complete zero comply, infinite stress breaks producer spirits omniphorically
Asked by nomusicmakingforever (73.181.182.x) on August 6 2026, 6:03am
Reply on August 6 2026, 7:02pm:

poetry? Comment...

Question: Although this will not happen, if reaper can be acquired, what is the current price of reaper in the global market?
Asked by nooooooo (112.225.225.x) on August 5 2026, 1:53pm
Reply on August 6 2026, 7:03pm:

If someone can create a foundation that has a solid plan and enough funds to cure world hunger (what, like $100B or so?), and will only do it if I sell REAPER to them, then that would seem reasonable enough. 1 Comment...

Question: here a video made with Ninjam youtube.com/watch?v=XAVQLzfFUBg
Asked by Bernd Keul (85.197.36.x) on August 2 2026, 10:41pm
Reply on August 6 2026, 7:03pm:

Cool! Comment...

Question: In JSFX, how many decimal places are capping your $pi. Can I see the exact value you using?
Asked by $pi_deci (102.176.65.x) on July 30 2026, 4:27am
Reply on July 30 2026, 9:37am (edited at July 30 2026, 9:42am):

see source

1 Comment...

Question: which part/file of the JSFX opensource code on your github does the automatic bump to 64 bit. I noticed JSFX plugins, even when all sliders are 0 or have no effect, it automatically makes the incoming audio have like 64 bit mantissa on the bit meter. I wanted to replicate this in a vst3 and wanted to take a look at how you did it. So wih JSFX, even if an incoming audio is 16 bit, the moment you insert a jsfx effect on the incoming audio when no slider is even applying any effect, it becomes 64 bit
Asked by mantissa (154.161.250.x) on July 28 2026, 3:33am
Reply on July 28 2026, 12:33pm (edited at July 28 2026, 12:35pm):

This block here

1 Comment...

Question: hi Justin, I've noticed that after upgrading to macOS Tahoe many plugin UI freezes or laggy during large mixing session , is thrr anything we can do about it ?
Asked by arthen (45.62.172.x) on July 27 2026, 2:34am
Reply on July 27 2026, 1:38pm:

dunno, try upgrading plug-ins, audio driver hardware, etc? Comment...

Question: Have you checked in on FreeNet lately? Maybe something of interest? youtube.com/watch?v=3RBNboYUlVI
Asked by dom64 (82.132.213.x) on July 25 2026, 11:17pm
Reply on July 26 2026, 10:22pm:

I haven't, will take a look Comment...

Question: Have you ever gone through a long phase where you just didn’t feel like working, or even stopped? I’m thinking before REAPER, but also now, because although you obviously love programming, it probably isn’t always and only fun.
Asked by segfault (86.192.60.x) on July 25 2026, 6:03pm
Reply on July 26 2026, 10:21pm:

for a few weeks at a time, for sure! but probably not much longer than that. Comment...

Question: Have you considered teaming up with the Reaktor folks? NI is dying, and Reaktor IP is probably gonna be pretty cheap. Integrating it with REAPER would be so neat, and it could revitalize Reaktor itself.
Asked by ms.dosss (73.241.237.x) on July 24 2026, 10:40am
Reply on July 24 2026, 2:35pm:

Something like that could be interesting but it would be a distraction from making REAPER... Comment...

Question: Are you a fan or proponent of LCR panning?
Asked by Tony (125.237.128.x) on July 23 2026, 4:00am
Reply on July 23 2026, 1:31pm:

first I've heard of it! I routinely pan by 15-20% so guess not lol 1 Comment...

Question: may I invite you to see what I mean by slop-driven developement? they've embedded whole chromium for so called "fan-zone" and podcast/radio directory and it now weights almost 90mb! -- here's the link: download.nullsoft.com/winamp/client/
Asked by whipped llama (again) (51.159.125.x) on July 22 2026, 5:38pm
Reply on July 23 2026, 2:30am:

not gonna download that lol! 1 Comment...

Question: Hi Justin, I know that you're no longer interested in the good ol' player. just due to curiosity, has current deranged corpo behind winamp ever tried to contact you?
Asked by whipped llama (2.147.159.x) on July 22 2026, 4:10pm
Reply on July 22 2026, 4:21pm:

they haven't, I might have emailed them at some point to see if they wanted to offload anything like nullsoft.com, but no luck. 1 Comment...

Question: Default render path If the relative path is set, the file will be saved to the relative path of the Default recording path. Why is this?
Asked by nicotomia (112.225.225.x) on July 22 2026, 9:46am
Reply on July 22 2026, 12:52pm:

Because that's the way it's always been! Comment...

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