3 
By playing a 7*^ips tape at 15ips I can analyse the range from 
about 45- 4,000 cps, although the time axis v/illbe compressed by 
-j. More important 3tsr, though, I have also ordered a newly developed 
attachment which enables one to select any one-tenth cf the vertical 
frequency scale (say, 85-800cps, or 800 to 1600) and magnify it to 
the si„e of the full spectrograph, By playing tapes at p speed 1 
could instead look at the ranges 85-1600, 1600 to 3200, etc. In other 
words, although it may require more than one run to picture any given 
sound, this lcokfcs as if it may' be our ultimate weapon - it should 
give us anything we want. (Ultrasonics can also be handled by simply 
slowing the tape playback - the problem is to get the original recor- 
dings, as you know.) 
That news is good, but here’s the rub. Delivery is "promised" 
as within 6 to 8 weeks (ie., late October, if they live up to their 
promise). Delivery of the special gadget to select any tkenth for 
scale magnification will take an estimated 4 weeks longer (late Nov. 
or so). Nov/ the marmosets are, I hope, fairly high-pitched, 
so hopefully we shouldn’t -need the magnifier for them. I’d be happy 
to work on the tapes the instant the machine is available, and, if 
it cones on time, this could be soon enough for your December lecture. 
On the other hand, it gives us damn little leeway. (Aha, checking 
your letter I see that this is not a lecture but a beck - which might 
givex us more leeway. ?) Two alternatives cone to mind: 1) Griffin 
might let a technician do the job on his machine, but I doubt it- he 
specified me for the job originally, and trusts almost nobody else 
with the beast; 2) Cornell has, or at an' rate, once started a 
Sonagraphing service at 51 a shot - I used this for my thesis and 
they dure did amaz: ngly crummy work. In a pihch, though, if the ser- 
vice still is operating ... Maybe your original Nav, contact or your 
3E friends c n help, but failing them I suspect I’m your best bet. 
I’m really quite happy to dc the work for you, only wish I could 
promise to meet your deadline. I suspect I can meet it, and canx 
make frantic phone-calls to Kay Electric from early October on to try 
to speed up delivery. 
Technician: I budgeted $2,500 in my grant for a part-time 
assistant and wrote a verv tight grant which gives no leeway to shift 
funds about unless 1 forgo some equirment. h.'dth offers from cu aa d 
I-iacArthur to use this person part time 1 can see totalling 3,500 (I’d 
not want either of you to contribute more than 500 as I don’t imagine 
you’ll have that much for the person to do - although 1 might some- 
time need seme helm from you for Sonagraph maintenance) which would be 
a sufficient salary for a technician at Harva rd. Lc and beheld, the*, 
this University has a Personel Service which sets pay scales - and I’d 
have to offer $4800. Gut of the question - but I’ll find sore way 
around, over or under this ruling; while squabbling abc ut it here, I’m 
going to count on $550 from you (500+ 10% for Soc Security, etc). Shall 
report on it as soon as I can. 
I wonder if I dare try smuggling from Foto International - 
the thought of "cheap" Nagras falls heavily on my sensitive ears. ; nd 
a Sennheiser raike - wow; I got one approved in this grant, so shall 
be buying one, they do seem to be nearly ideal. Sorry ny Cambridge 
dealer never came thru’ on the Nagra - he’s always been most reliable 
in dealings with me. 
student 
This 
I’ll check with a 
last year whe was 
ultra-senicx stuff 
friend (Dick Phillips) as I think 
working with the hearing abilities 
of yours is a bit discouraging. 
he 
of 
had a 
parrots. 
over 
