This is a great age for a new caller just because of all the avalible instructional video & audio that is avalible. Even if you don’t purchase any of these, you still have the Internet capability of listening to MP3’s to give you an idea of what you need to sound like.
You will find that there can be quite a difference in the pitch of the call. A standard Cottontail can sound high & clean with some brands while being more raspy with others. Some are adjustable for the whole range by sliding the reed retaining clip up & down such as in a Burnham model that I own, or even changing the entire reed like a Knight & Hale or some other models would have you do. I do have a couple of the 3 in 1 calls and They can work very well.
You really cant go wrong but will have to learn what pitch works the best for the Coyotes in your local. One thing that I will empathise is to power up your call with your air sorce coming from your diaphram, not your mouth. This is a very powerful air sorce that will let you call as loudly or softly as you wish along with being able to add or remove quaver to the note. Plenty of practice is encouraged and you might be able to practice on your local Cats & Dogs depending on your neighboors & location of course. This will give you the chance to work on your volume while duplicating the same sequence. Don’t be scared to use your off hand to cup & squelch the volume as nessary.
Also remember to play the part of an injured animal or an animal in distress. This varies as you can tell by listening to different MP3 versions but the important part is to put some feeling into it.
Hope I didn’t over complicate things. You really can get by with just one call but I will Usually have at least three on me in case of reed freeze down or such. I would say to buy one and use it. Also you might revisit what you were doing with the Turkey diaphram call…Some of the guys would pop it in their mouth then practice saying why..whyy..whyyy for predators instead of pronouncing Chick to get your basic cluck. My own diaphram is an HS Strutt dble kee-kee which replicates a young turkey in distress. I start with a few clucks, but then get it moving to high and fast yelps. I have also used that little disk shaped Mr Squirrel call for Fox & Coyote. You can enhance this by shaking a small sapling via foot pressure while calling. Then we get into the Howlers but that’s another story. The important thing is that changing up on calls will keep one from burning out an area or educating Predators to the same dying rabbit sound.
Sorry for the long wind but this sport really does cause a fever that wont go away like GDOLBY said. I see that BIGJEEP man has some great links posted And that
OSO45-70 has pegged the reasoning well on why some of those boys have multiple calls.
That one call purchased can be very versitile like NONYA said and will call in every predator bird or animal out there. Just watch out for those Great Horned Owls.