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Re: ABSN reversed playback behavior

From: Joe Berkovitz <joe@noteflight.com>
Date: Thu, 9 Mar 2017 16:55:46 -0500
Message-ID: <CA+ojG-bd3g1x=HbBuXX-o6s=UBMv-3-zydz7kBuABtB6TV31Dg@mail.gmail.com>
To: Raymond Toy <rtoy@google.com>
Cc: Hongchan Choi <hongchan@google.com>, Audio Working Group <public-audio@w3.org>
At this point, based on the survey of what actual samplers do, I feel like
the expected behavior should be as you and Hongchan have argued: that the
loop "traps" reversed playback.

I amended the current PR to reflect this last week, so you should now see
the wrapping behavior that you expect (and I won't continue arguing that it
should be otherwise!)

.            .       .    .  . ...Joe

Joe Berkovitz
Founder
Noteflight LLC

49R Day Street
Somerville MA 02144
USA

"Bring music to life"
www.noteflight.com

On Thu, Mar 9, 2017 at 12:52 PM, Raymond Toy <rtoy@google.com> wrote:

> Is there a conclusion or consensus on this?
>
> I've been holding off reviewing the PR for this until we have a consensus
> on what the expected behavior is.
>
> On Fri, Mar 3, 2017 at 12:35 PM, Joe Berkovitz <joe@noteflight.com> wrote:
>
>>
>>
>>> I spent a good chunk of my life with Max/MSP and I can tell the groove~
>>> supports negative playback rate with looping. The reference might be
>>> incorrect - I just downloaded 7.3.3 and confirmed again; groove~ supports
>>> the negative playback and it runs like option (2).
>>>
>>>
>> That is very good to know.
>>
>>
>>> > Apple Logic X Pro (one of the most popular DAWs): loops are ignored
>>> when "Reverse" option is selected on an instrument zone (verified by trying
>>> it)
>>>
>>> From your mention of "an instrument zone", I believe you meant EXS24
>>> sampler. The new Alchemy synth/sampler actually supports the reverse
>>> looping.
>>>
>>
>> Thanks, I don't know Alchemy very well yet. When it plays backward, does
>> the playhead get "trapped" inside the loop?
>>
>>>
>>> FWIW, Max/MSP's groove~ is the closest thing to our ABSN. We don't have
>>> to follow but I believe that's what most computer musicians (including
>>> myself) are expecting.
>>>
>>
>> Again, that's a great data point to have.
>>
>>
>
Received on Thursday, 9 March 2017 21:56:23 UTC

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