"He is expected to master almost everything: composing, write score and parts, he should be mixing engineer, mastering engineer, IT technician, studio technician, backup technician, ..."
Lecturers, established composers, studio experts and several software manufacturers emphasized that education and training in this field is extremely important. Especially in the media, there is a great danger of overconfidence or overestimation of the equipments capabilities. Those who lack know-how can always seek professional help and refrain from wasting precious time through experimentation. This applies to the search for studio equipment as well as the creation of huge templates or setups.
Ask a director why he just wants to work with one or the other film composer ..."
Not every film composer has a corresponding study behind him. There are plenty of career changers who have developed a feel for the subject matter, who are flexible and eager to learn, and who can professionally solve projects in a variety of formats as creative employees in production teams.
The ways of getting the necessary know-how are very different. And the biographies of TV and film composers show that it is not always the graduates of the relevant schools who get the jobs or win the prize.
The lack of aural imagination was mentioned as the greatest shortcoming by lecturers or studio directors. Especially in the situation of a studio production with live musicians or an orchestra there is always cause for criticism. The intensive study of instrumentation and orchestration pays off - it is precisely this content that is indispensable in classical study programs.
Visiting an orchestra rehearsal is often more beneficial than reading a quick guide to instrument XY. Also on this topic there are online tutorials and courses at a high level. Parallel to the classical acoustic instrumentation and orchestration one should deal urgently with the instrumentation and orchestration for virtual instruments. There are also very good course offers for this.
"Virtual instruments ... have the disadvantage that they often do not sound authentic, which users try to conceal, for example, with the layers of multiple libraries, reverb excesses, depth staggering, etc. That they do not sound authentic is usually not because the quality of the samples is poor, but because of either a lack of programming by the composer or a lack of articulation, sound-bridging artefacts, dynamics inputs or bursts etc ... "
from the long list of possible errors.
"Lack of knowledge of the playing techniques of the simulated instruments, [lack of] technical understanding of the digital possibilities (controller function, application of articulations by certain techniques, room simulation)."
"…that actually every note has to be played with new / different articulation... that actually any longer endured note should not sound static ..."
"... lack of know-how of the player's musical parameters ..."
"... undeveloped interpretational power of imagination, undeveloped and imprecise "inner ear" for orchestration or instrumentation ..."
"It requires a high level of listening skills to recreate the room ambience and reverb of the live recording space so this exercise really makes them listen carefully to all the aspects – instrument balance, placement in the aural field and the effect of the room itself..."
For some products (studio software and sound samples) there is already good documentation and additional tutorials for special situations. For some manufacturers, you have to desperately search for this material. The pressure of the user is obviously not big enough yet. Anyone who gets stuck in documentaries, tutorials or forums, should turn to proven specialists (tutors) and also invest money: it will be worthwhile!