Snakes

[D.Ipsum]

The bird is synthetic?

It's in the soundfont, the sea noise as well. It's freely available here:https://goo.gl/4KWeXh under MIT license I guess.

I do not know why, I feel like it's a synthetic bird.

It's quite easy to synthesize imaginary birds in LMMS.

For example, with a sine wave of the TripleOscillator, in the Piano-Roll, you place a high note of a certain length, and you alter it with the detune editor to give it a particular phrasing. You can then play with the LFOs and the effects or with what responds to your working hypotheses.

It may be useful to visually observe bird songs, for example via a web search:
https://www.google.com/search?q=spectro ... 80&bih=677

An example of birds and other synthetic creatures that I programmed in LMMS (mainly with TripleOscillator):
https://soundcloud.com/dipsum/0121-03-1-wip

You can also make your own sea waves from white noise (e.g. play with the volume envelope, using a low-pass filter, and so on).

[aquire]

The bird is synthetic?

It's in the soundfont, the sea noise as well. It's freely available here:https://goo.gl/4KWeXh under MIT license I guess.

I do not know why, I feel like it's a synthetic bird.

It's quite easy to synthesize imaginary birds in LMMS.

For example, with a sine wave of the TripleOscillator, in the Piano-Roll, you place a high note of a certain length, and you alter it with the detune editor to give it a particular phrasing. You can then play with the LFOs and the effects or with what responds to your working hypotheses.

It may be useful to visually observe bird songs, for example via a web search:
https://www.google.com/search?q=spectro ... 80&bih=677

An example of birds and other synthetic creatures that I programmed in LMMS (mainly with TripleOscillator):
https://soundcloud.com/dipsum/0121-03-1-wip

You can also make your own sea waves from white noise (e.g. play with the volume envelope, using a low-pass filter, and so on).

Wow that's a lot of information!
As I remember, I had a Yamaha keyboard with these exact sound effects, "Bird Tweet" and "Seashore". As [1] suggests Yamaha had many techniques for tone generation. I did some digging but couldn't find the exact origin or technique they used to come up with those sound effects.
In my opinion bird tweets can be easily synthesized with finite number of sine waves plus effects including detuning unlike human voice because they contain less number of harmonics and variation.
I agree with you that it is most probably synthetic rather than sampled because Yamaha will tend to use synthetic since it will save lots of memory etc.
If you find some clue please let me know...
Sorry for the late reply.

[1] https://europe.yamaha.com/en/products/c ... index.html

[D.Ipsum]

Wow that's a lot of information!
As I remember, I had a Yamaha keyboard with these exact sound effects, "Bird Tweet" and "Seashore". As [1] suggests Yamaha had many techniques for tone generation. I did some digging but couldn't find the exact origin or technique they used to come up with those sound effects.
In my opinion bird tweets can be easily synthesized with finite number of sine waves plus effects including detuning unlike human voice because they contain less number of harmonics and variation.
I agree with you that it is most probably synthetic rather than sampled because Yamaha will tend to use synthetic since it will save lots of memory etc.
If you find some clue please let me know...
Sorry for the late reply.

[1] https://europe.yamaha.com/en/products/c ... index.html

I do not know anything about the techniques used by Yamaha.
The technical / economic argument makes sense.