<Sound Dev> MIDI to audio files

[Alan Snyder]

A convenience method would meet my needs, something like:

AudioInputStream getAudioInputStream(Sequence seq, AudioFormat targetFormat)
        throws MidiUnavailableException, UnsupportedAudioFileException;

An AudioSynthesizer interface (of some form) might be useful to select among multiple software synthesizers, if that should ever happen, and might be useful as a service provider interface.

  Alan



> On Jan 8, 2019, at 7:08 PM, Sergey Bylokhov <sergey.bylokhov at oracle.com> wrote:
> 
> I agree that we can move it to the open, not necessary as-is.
> Or probably we can provide this functionality via Midi/Audio/Systems.
> 
> On 07/01/2019 15:41, Alan Snyder wrote:
>> I’m not sure if you are agreeing that it would be useful or arguing against making it public.
>>   Alan
>>> On Jan 7, 2019, at 1:39 PM, Sergey Bylokhov <Sergey.Bylokhov at oracle.com> wrote:
>>> 
>>> For sure this is not cancellation of functionality, because it wasn't a public API.
>>> 
>>> Currently it is a implementation detail of SoftMidiAudioFileReader and
>>> it looks useful since it provides the same functionality + the code in
>>> the getAudioInputStream(Sequence) method is not so trivial.
>>> 
>>> On 07/01/2019 13:21, Alan Snyder wrote:
>>>> It is probably not a performance issue, but what is the point of concealing that obvious functionality?
>>>>   Alan
>>>>> On Jan 7, 2019, at 12:55 PM, Sergey Bylokhov <Sergey.Bylokhov at oracle.com> wrote:
>>>>> 
>>>>> On 07/01/2019 12:29, Alan Snyder wrote:
>>>>>> Your suggestion works and requires less code, but it is not the best fit for my use case.
>>>>> 
>>>>> Yes, in this case you will need to write data to something like ByteArrayOutputStream, and read it back by AudioSystem.
>>>>> The code will be small comparing to AudioSynthesizer, is the coping of data is a really a big problem and does it play a role in slowness the program?
>>>>> 
>>>>> 
>>>>>> In my case, I have already constructed a Sequence. To use your suggestion, I must convert the sequence to MIDI data so that I can provide it as an InputStream to AudioSystem, where the first thing that happens is that the data is parsed back into a Sequence.
>>>>>> I see no public way to get a Sequence directly to SoftMidiAudioFileReader.
>>>>>>   Alan
>>>>>>> On Jan 7, 2019, at 11:20 AM, Sergey Bylokhov <Sergey.Bylokhov at oracle.com> wrote:
>>>>>>> 
>>>>>>> Hi, Alan.
>>>>>>> 
>>>>>>> I guess it should work using AudioSystem, which for midi files
>>>>>>> should work on top of com.sun.media.sound.SoftMidiAudioFileReader
>>>>>>> 
>>>>>>> On 06/01/2019 18:19, Alan Snyder wrote:
>>>>>>>> As far as I can tell, the ability to synthesize audio into files from MIDI was lost during the great Java modularization due to the failure to export the AudioSynthesizer interface.
>>>>>>>> Is there some reason this has not been fixed?
>>>>>>>> See JDK-8170518 <https://bugs.openjdk.java.net/browse/JDK-8170518>, which I filed in 2016.
>>>>>>>>   Alan
>>>>>>> 
>>>>>>> 
>>>>>>> -- 
>>>>>>> Best regards, Sergey.
>>>>>>> 
>>>>> 
>>>>> 
>>>>> -- 
>>>>> Best regards, Sergey.
>>>>> 
>>> 
>>> 
>>> -- 
>>> Best regards, Sergey.
>>> 
> 
> 
> -- 
> Best regards, Sergey.
>