WWDC2004 Session 223

Transcript

Kind: captions Language: en welcome to the sentencing in this session we're going to flip off that we're going to becoming the general topic of what is the audio unit Alyce Caron is posted and then at the end of the session audio breaking API to the traction or do as contract come on using your age like what our units can perform another function hugs applications with digital audio workstation Apple should abandon as you can see these applications have a fairly broad range is also you know any number of you have patience I can come over to the video a few carriage ban which is pretty broad range for the audio unit that is typically used in generate audio a typical example be a sample to get some kind of Midian you want to an additional to allow applications to do with a bunch of configuration and then turn the audio okay now you can do allocation and then in the hope of the elevation and the mind works for surrendering and so there's an OPR cause that's where you ask the audience to reduce commands or the other in the process of rendering their happens parameters or things about the vendor exposures that you wanted to tell you want to change their values so you look at parameters parameters take 33 pages and brandon's be coming to five parameters where you can just set it the streets or there's a strapless much pain laminate that you basically and then reset also has a relationship you know declares state has changed to basically called a unit he saved audio data that has this time go back we have some extensions these are typically implemented specials or the specialization so in order to facilitate the development we obviously spent a lot of Ali understand it's all is really just Testament guys try to break right go to make sure and it's the foundation for this new thing that we're doing and that's the validation it really can't and this provides a fairly take will be looking at this just to give you some background that means has loaded us to do how are you TWiki what I want to do now is to love through the validations just take a look through the validations and look through the different page then as we go through the first test validation is it just feeds if it can find your audio unit what we're doing is we're just trying to find we can actually open it we're expecting some information from the component manufacturers and then we run the clothes all the time and this is the promise we might help to concentrate you have 200 each other Oh two ish and once the rope in your day we have a look at figuration you can we look through the round how much you is then the validation to look at some recommended properties recommended so this is actually life asleep and the first property was looking at it company that sells the most common types for giving samples to a few and might they should be involved in several different it could be the input parameter I come about my old card that actually execute they have is similar property but this time was looking at how long does it take for example to disappear my line c mccullum you can take a pile of filters have ramping Carol crime is really used by application dealing with applications in conjunction NB you say okay if i play a song from start to finish and / listen to the audio that comes out of and it will sound like this now the audio that comes out of my body oh it's still going to be trailing application like doing the dish yer Frank company there's a couple of companies and we just really verify get information number Channel if the if any other time you have what I have here is that I don't you remember to start we have with validation so we booked pad lock the audio units time and in this case here I've got a stereo track coach Gary are able to create sub menus and because i'm doing stereo to stereo its track over here see now area what a hopeful often do is the new people run run information information patients can see what the boost okay so getting this more than special properties a special properties the property by the carbon garage you publicly Oh you effective rate that is the whole units America's really cool we also have user presses this is with the property called pass control but he is the wants to go in and now we've described we'd like to see the hostess supporting the location for couples locations and by doing this it means that when i'm using one application all right here's the multiband that we looked at before actually I'm going to before we look at this run more but we talked about parameters before we talked about how or a unit treatment is really timing parameters state but it may be a contentious but then there is it a useful information we provide a belly which if you doing sure so we've been looking at the multiband and one of the uses of people make out of before I can of generic you hi have you had your thing here there's a couple of things we talked about the pregame parameter here the generic you getting information right you'll also notice that there's a kind of visual pensioner man is it parameters wow it's the radar [Music] see that up pramit is there that's just still a parameter to read our me and showing me how much each of the bands I'm excellent reading that it's fun and I've got the different factory presets over here the different types of fitting the h extremo physically could you leave us to be very happy having a good collection agency I can also I'm hearing here for the hearing the neighbor favorite well actually and then I can do it favors preset here what we're doing in the dialogue views showing halt we've got a user's location so amusing me sweet that's only going to be visible for one user local means anyone on the machine basically said and then it's going to create a directory I can show this find the gear okay who my feet that's to make sure I've got an apple paymatrix reverb do now then any application we had a look it's far from cloud is promoting I can have a look at this and immersed in our parameters for the proficient types of things about menus of the check boxes all of the menu items name credit nice presentation to generated from the generic parameter information as I say see like that he's actually riding up the parameters as a hickey from google and he's able to do this for he can just send a notification to me he's not doing it from industry to thank its parameters change the notification system to the tram the host you will hear the parameter change come in and then they'll set the value and then when it goes off that's beginning to really serious so here's a custom how did you going to show you this I can whip up the keyboard navigation going these are just out for us going through the factory reset its mind you can present this to know you can prevent this in a menu and that will be fun the top with the menu is that earthships a couple of hundred years of pieces incredibly he thinks immune to our different categories so we've keyboard navigation you so by doing usually it then it really becomes brighter useful features that gets exposed to the user to you taste goes you can see all of the difference here Oliver doing in how you have is we just going through the orig rectory and every direction of mistake let's tie on one of the things i wanted to show you so I've actually got a drunk man coming from the prior things that we're doing is you can give is ever found expanding the cow know is we're using the ability from doing what we're doing here is just a few and it's just controlling how the application of probability here to say what channels i want to get from the device with the key ranges as you can see I've turned the pitch up the mini oh then the next thing that's going into does it look at all information you don't do any validation and it does a collection transitive now the rendered tested on as different numbers of crime okay to the nature those it does set max crime to that sort of thing you just sort of show you in in an application you may have like over 50 women here will now I'm going to have to tear down the whole document just to reconfigure the i/o bus so that's that's part of this path of the sample rate of the device then the part of the rendering also semantics and connections validates actual the irony it's kind of so the sort of the best practices embedded into validation for initializing coats should be telling max range and we expect them you can explain it after you haven't made this I can tell you something okay the right time we've gotta hope that and the user has said that they want to ramp from one tramadol base to the next row and the hostess has translated into a ram 128 after audio unit says it can be back then the whole agent is being closed contingent spoon of hampstead started in started duration and starting value in any place and then we like to speak to support because we also think for you know better how to do ramping if the parameter is not perhaps a man can be stimulated by scheduling parameters I want the host and others into action then the idea is to render a fact not illegal chili powder it'll first it'll then destroy I'm gonna break this I'm going to render I'm gonna do a second render how its kind of schedule a friend of schedule schedule and it sort of practice and it's published are we really would like courage this isn't something that we do now if one of the things the value loud buzz we mentioned previously is that it really feels in a very sort of hyper sensitive situation very very actually for this manifestation of differences and delivered and what will happen to them there's a fourth when you take too long you'll do the archival of the third when you save it this case we have we like should assume it developer when you think after windows not in higher it changes audio ok so there's a couple of advanced big things that I want to go through and one of the things that example then think my mechanical cat it has Oh ok first of all is a collection of tracks here you see the space hello judgment come this is the dls music today I've got did front turned up I'm not actually having this out going into the mix coming attractive that's what I'm doing and so you can see that we've basically got audio ill if we have a look at when you make a new document when I choose you active what are you later your eye ok so we have this ability to punch appropriate and it doesn't really matter exercise the full of reaction process extinction oh right a week because both sides however I want to use this free now if I bring up the axes you buy because once you get into an audio units like this you really can't think of a good way that a generic to take care of this and how you really so you can see the diagram here that I trust their carbon which is outputting chance to the left I noticed the reactant home and funny using so challenging because when we see it do it he sits with well actually I run a two hour to hour to channel each show that I'm channel I can then i can connect these up you actually got a layering out the food to instance I know things like this guy over I actually just have this now you should this should be coming out of a speaker coming out of it so I learnt let you kind of mix and match things see I think this is an important thing that we forget evaluation of what our units kind of work with other audio it's nice to have a post where you can play around to see how they going to mix with other what are you maybe there's even patches happens fever pianos found a couple of different places I'm reactor itself internal management you can say like bubbly okay so how your lab is really focused on your budget and we really funny look out by real time I ask you since I've only got off I mean but we call this a little big but there was a rival for a little less powder whenever there are so you can't use them in and then there's and you'll have to think i'm going to close it 33 million so he chose the bank example if you perv efficient car this morning put a unit generator and what are you going to generate it can regenerate audio no time to do if putting in a generator publishes of you and we're going to say the time and it's potentially in auto you did a hosting if it doesn't publish me like schedule then it's really nothing and then if you're on typing generator one of the things we provide defense will catalyze they will you probably told the audience I bring the fun happens a lot of times will correctly one record audio else's culture keep treating control done with the generator so thankful about that why are you on accession to go the demo where it's gone to it this brave man but we look I built that you are to the partisan come up in a flat for the favor in and then clicking with this with this do i define any arbitrary region that I want trial I can lose those feet at a region human it's kind of going to be converted to do that it's the real-time Spartacus is coming from the road coming from but then the front edges can't look at what its parameter settings and determine literally start because I photogenerated there that's just generating videos I'm assuming that I can ask private you [Music] it's a frantic chatter with any place with the quality we getting buzzed by the still some work place like this to speed up a little bit as you bareback ridin i pray i can define a whole bunch of regions using the North Iowa you hear from transporting I can go I can thank you guys flower and I can pitch none of the things you will notice you rollin we have a standard the next code happy what our unit pramit establish a friend so that's it saying well you know we thought of love during the validation soul we looked at are you laughing charge you how you I like to thank only developers to his ex heidi instruments destroy effects where you see the application more information basically if you go to Japan on apple.com / for the other things too you're also pretty active you