<Sound Dev> MIDI to audio files

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Wed Jan 9 03:08:46 UTC 2019


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.


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