{Request} Wildcards in .wave statement

Hi JHerrmann ,

This is already supported by string expressions in versions 24.1 and up.

From the Help:

.wave <filename.wav>|<string exprssion> <Nbits>  <SampleRate> V(out) [V(out2) ...]

and

String parameters only support the "+" operator for string concatenation, e.g:

.param variant = "_fast"
X23 PIN1 PIN2 {"U125D" + variant}

mike

I will test this as soon as possible (=tomorrow). As you show it, i guess [.step param variant list "_fast" "_slow" "_medium"] would also work as intended? That would really be something new (and useful!) - i searched all the internet, and even asked AI (MSCopilot) for it - but nobody knew something. From your point of view ("read the manual") it seems logical - but this kung fu (with + operator) is really somewhat unsual .. i guess... I come back to you, as soon as i have tested it. Thanks for now. Very much appreciated - really. 

Hello Mike...

Sorry for coming back here a bit late. I have tried your suggestions, but i am not even able to set string variables. ".param text="xyz"" or ".param text= 1 + 2 + 3 + "text" leads to "couldn't resolve parameter" errors. Using plain numbers instead of text leads to invalid Stoi errors in the .wav command.  That doesn't kill my project, since i have switched to batch-mode-simulation and bash/batch programming of the netlist instead. Working under Linux, i am able to modify the netlists and start runs with parameters and wav-names as i want. I believe, for my project, this is the definite solution, but i am still interested in what you suggested. But as of now: it simply doesn't work. Sorry ... either i am doing something wrong (tested different variations - also with "&") or it simply doesn't work. LTSpice version FIY is: 24.0.9 - i will try to get a newer Version, next time i am on Windows. This could delay until the weekend i believe, since i am very busy atm.

Hi JHerrmann ,

Huh, I'd better look at this. Thanks.

mike

yepp - i think the fault is on my side, since i am running version 24.0.9 - the recent version is 26. So... Maybe its just, that i am a bit late regarding my updates. I come back to you, as soon as i am on windows again. By the way: Bash-Programming of the netlists is like... well.. LTSpice as Atombomb. I am able to deform the netlists in every direction i want. Prototyping: As usual with LTSpice -- Mass Production of Output: Per Bash- Netlists - and LTSpice in Batchmode...Definitely the way to go (besides Python-LTSpice etc..) if you are mass-processing... By the way: Are you aware of any useful tools to convert RAW into WAV?

Hi JHerrmann ,

If you are using LTspice 24.0.9, it will not work. You must use version 24.1 or higher to use string parameters. As there are quite a few stability fixes in the latest version, 26.0.1, I would highly recommend updating. 

MStokowski said:

This is already supported by string expressions in versions 24.1 and up.

mike

Yes. Sorry about the concurrent reply.

JHerrmann said:

By the way: Are you aware of any useful tools to convert RAW into WAV

I don't think so, since it is sampled waveform file, and the raw file is not really a simple x-y. I'll ask. You can export waveform results.

BTW, any chance the multi-channel ability of wav files helps you? Say, instead of ten individual files for each run, you produce a wav file each run with ten channels. Maybe you already do this.

mike

You wouldn't believe, if i told you, what i am doing. LTSpice makes Music. I use WAV output to feed Renoise (Tracker-DAW) Multisample-Instruments - per bash - fully automated. For this task i need specially designed mono-wav (or later maybe 45°out of phase Stereo). I render 120 Wav-Files (for 120 Notes on the scale - per instrument, that is - in other words: Per (virtual) VCO Waveform) and wrap them up to a multichannel-instrument - I am fully aware of the Multi-Channel ability of LTSpice - it has maybe the best, and most flexible WAV direct-renderer - i am aware of. This is, why i use it. Something e.g. Qspice, Tina etc.. are still missing. And yes: "Normally" i use LTSpice for Circuit simulation - but right now - i am building something like an organ-instrument - and LTSpice is my Waveform-Constructor - with B-Sources, a lot of Maths and MS-Copilot (AI) as Guidance regarding all sorts of mechanic (acoustic), mathematic, or programming-related problems. Anyways: As for now, i need mono-out. Again: I come back to you at the weekend - when i am on windows again, and able to update my LTSpice files. Thanks for all. Really appreciated. And Yes. I know, that the RAW File-Format is asymmetric regarding the timeline - so: Decoding would be needed. As far as i know, there exist scripts - and addons for some Maths-Programs - but i don't want to dig too deep into this, since -- yes, you are right --  i already have one of the best WAV Writers worldwide (=LTSpice). 

JHerrmann said:

You wouldn't believe, if i told you, what i am doing. LTSpice makes Music.

Would you believe. I'm not surprised. At all. :-)

Cool stuff. Are you sharing your results anywhere? Would love to see how it goes. Sure many here at ADI would agree it's a worthy project.

Are you able to produce soundfonts for your instruments, say for use in musescore or simply better midi representations?

mike

edited --- [offtopic]

Hi JHerrmann ,

Very cool. Curious about how well you are able to produce acoustic instruments...

mike

Hi JHerrmann ,

Very cool. Curious about how well you are able to produce acoustic instruments...

mike

...updated to Version 26 .. and yes: string params are now working, but i am not able to get the syntax for the .wave command - either i get errors ("expected expression here") or the param (.param text="abcd") is not read, but interpreted as plaintext ("text" instead of "abcd"). I short words: It is not working. Reason: Either i don't understand the syntax, or it simply doesn't work. What i wanted was something like this "/drive/folder/filename+{param}.wav.