B: So .
C: Right , right .
C: They don't all work , but the nice ones , the um Plan - Plantronic ones work .
A: OK .
B: So , we 'll just have to see if that works .
A: So a little bit of futzing , there 's the issue about a cabinet , we might want to change some pre - amps .
C: Yeah .
A: So we can do some more recordings but there 's there 's a little little bit of ramp up on that over the next month , say .
C: Yeah , yeah .
B: Right and also I would like to work out some of the software issues a little more completely .
B: So , um , you know , we 're gonna want to resample and con and bring them over to another machine and uh um organize the how we 're gonna store it all .
C: Yeah .
C: Yeah .
C: Yeah .
C: Yeah .
A: Yeah we were talking about that a little bit over coffee today , that that um uh if you downsample it sounded like it came it sounded like it was something like a gig gigabyte an hour if you didn't downsample
A: and once you downsampled then it was something like four hundred megabytes an hour , if you used all if you used all C: Per channel , or ?
A: no , if you used all the channels .
A: Something like that ?
C: We figured out that it was t twelve gig twelve gigabytes an hour ?
B: It was more than that .
C: For for all the channels ?
C: Was that with or without the A: I thought it was one gigabyte .
A: It couldn't be twelve .
C: Cuz no , we 've only no , I mean we 've only got four gigabytes and that
B: We said , four gigabytes would give us twenty minutes before we did anything else .
C: Yeah .
C: Right .
C: And then we then we cut it in half .
B: And then we cut in half , by A: How 'd you cut it ?
C: But By s saving sixteen bits on instead of thirty instead of thirty - two .
A: OK , so that 's so that 's two gigabytes .
A: And then C: Well no I mean it 's uh four gigabytes for forty minutes .
B: That 's forty minutes
A: Right .
B: So , six gigabytes .
A: But that 's at forty four kilohertz with sixteen channels .
C: Forty - eight kilohertz , yeah .
C: So we can actually triple that .
A: So you can A: right , so you can
B: Yeah .
C: So , hang on C: so that would OK
B: I came out at the gig an hour , at one point .
B: That that 's one computation I did for sixteen channels , sixteen bit .
C: Well I think it 's I think it 's two gig an hour .
B: Is it two gig an hour ?
B: I 'm off by an order of magni
B: That 's alright .
B: Order of two .
C: Cuz like , we don't  Maybe we don't We don't need to save all channels ,
B: Factor of two .
C: right ?
C: So , on average . We could we don't we we wouldn't use all the channels , necessarily .
A: Oh , we 'll do the higher math later , maybe but it 's so it 's so maybe like a gig or two a an hour ,
A: um but um C: Yeah .
A: OK , that is a bit more than I thought .
B: How much here would we have to reformat the drive in there to get some of the more space
B: cuz it I mean it 's a nine gig drive and there 's four gig on sc on scratch and there 's about three gig unused , it looked like , on the home directory .
C: Yeah .
C: I 'm sure .
C: Yeah .
B: I just don't know enough about LINUX .
B: How hard is it to repartition ?
C: It 's a pain .
B: It 's a pain .
C: I mean , you know , because cuz we 've got data on " user " ,
C: right ?
C: And then we 'd have to back it all up and copy it back on again .
B: Mm - hmm .
A: Yeah so this 'll take some thought cuz we have we um
A: If we are in fact gonna have forty or fifty hours at some point and we we wanna ha have part of our work be on feature extraction , it means that we need to have waveforms available somehow .
C: Yeah .
C: Hmm .
B: Right .
B: So I 've I 've already created a " U U , doctor speech , data , MR " directory , or had Jane do it and uh um but there 's not a lot of free space around .
C: No .
B: So it it it has currently about four gig on the drive that I think she 's going to put it on um .
C: Mm - hmm .
C: Mm - hmm .
B: And so we need we definitely need to go buy uh you know forty gig fifty gig of drive drive space .
C: Yeah .
C: We don't need all we don't necessarily need it all on - line .
C: I mean it will be different subsets .
C: So you won't you won't , you know , do all sixteen channels in a single B: That 's true .
B: I hadn't even thought about that , although it 'd be kind of interesting .
C: Yeah .
A: What would you do ?
C: You typically train I mean you 'd have fi you 'd have fifty hours
A: I mean C: we 'd only use one of the PZM channels ,
C: something like this ,
C: and so that would you wouldn't have to use all sixteen channels at once .
C: But it 's kind of painful for because basically , if we put them on C Ds then each CD will have all the channels for one recording ,
C: and then when you want to build the P - files , you just want to get one of those files off each of the sessions
C: and B: Yeah , it 's pretty horrible .
A: So what would we do for training ?
A: So if we 're if we 're training distant mi we 'd just use one of them ?
C: Yeah .
C: Well , maybe two of them , but I mean we wouldn't use we 'd only use the distant mikes ,
A: OK .
C: right ?
B: Yeah so it might be four .
B: Right ?
B: But it wouldn't be sixteen .
A: Well , although we wanted to get alignments from the close mike stuff .
B: But that 's a separate training .
A: Right .
A: But you don't want to be constantly take putting that on disk and off disk and on disk .
B: No wait .
B: More disk is better .
B: Absolutely .
B: I mean my my preference would be to get get ourselves a hundred gig of disk .
A: Yeah .
A: The thing is it 's really not very expensive right now .
C: Yeah .
B: And just not bother .
A: So it 's more of an issue of of structuring it with uh the uh Sys Admin folks so we don't panic them and figuring out where it goes .
B: And back up .
A: Well , we don't it doesn't need to be backed up .
C: Right if if we if we burn it all on CD - ROM , then , um ,
B: Right , then it doesn't need to be backed up .
C: in fact , we could you know we could throw away the Broadcast News stuff and put it on there or something like that .
B: Yeah , we were talking about that .
A: Yeah .
B: I 'm not sure if anyone 's still using it .
A: I think the only one using it has been Javier ,
C: Somebody used it recently .
A: but at this point I think it 's he 's only been using it for features that he calculated quite a while ago ,
A: so if nobody else is doing feature calculation C: Yeah .
B: I 'll send mail to speech local .
A: Pardon ?
B: I 'll send mail to speech local and see if anyone 's still using it .
A: How much space is that using up ?
A: Do you have any idea ?
C: It 's uh twenty C Ds ,
C: so that 's twelve gigabytes .
B: So that would last us for a while .
A: Yeah , couple hours !
A: Well , anyway for this this recording we 're fine
C: Yeah .
A: cuz we 're only we 're only A: how many mikes are we recording right now ?
B: Well , right now we don't have any choice .
B: It r still records all sixteen channels .
B: It 's just most of them are all zeroes .
B: So that that 's on our list too .
A: OK .
A: Yeah , well that we can do something about .
C: Yeah .
B: Yep .
B: It 's mostly a question of user interface .
B: How do we how do we specify which ones are on ?
A: Yeah .
B: Yeah , so we don't store any of our audio formats compressed in any way
B: do we ?
B: So these large sections when you guys aren't talking C: Yeah .
C: Probably , we could we could probably just run Shorten on them or something and it will get a big win .
C: I think that 's a good B: Run what on those ?
C: Shorten .
C: Tony Robinson 's uh lossless compression thing .
B: OK .
A: What 's it do ?
C: Um , it  it does AR modeling
C: and so it looks at a section , it runs an AR model to sort of r w to whiten it and then quantizes the residual with a nice with the three bits it can get away with .
C: Something like that .
C: So I think it On on each block it 'll  it 'll compress you know if there 's load on in any range it 'll use ratio bits .
A: Mm - hmm .
C: I think it does that .
B: Yeah , so , P Z
C: Yeah , well .
B: Yeah .
B: Yeah , it 's something that that we definitely need to look at with this .
B: Maybe we shouldn't 've subsampled it down to sixteen bits for our first try .
C: Well , it 's OK ,
C: it 's only the first try .