In rock music (or jazz, or pop, or funk) it is a common practice to make accents on every second quarter note in 4/4 time signature. But it is also quite common to make accents on every second eighth note, music gets agitated feel when this accenting happens. So, what is the conventional way to notate such a meter? I want to use a 8/8 time signature but I understand that this is not conventional at all (makes sense for me though). Is it double time feel? So, is it enough to write 'double time feel' in the beginning of a section with such accenting? It is conventional to do so with shuffle feel, I've seen it a lot of times in transcriptions.
Using a simple low-high bass snare-ish rhythm to demonstrate here are your options. The images are below all the descriptions.
The first is double time feel. Double time feel is indicated more or less as a courtesy since someone playing this literally will play it correctly without the indication. Some, myself included will say that seeing the words will affect the way you play slightly so I think it’s a good idea to include it. As you can see pulses per measure do not change in double time feel.
The second is cut time. Cut time maintains the same pulse but has only two pulses per bar so the effect is that the notation is the same for both. The thing about cut time is that it is used more for classical, opera, musical theater, etc. than it is for contemporary music.
Finally is the shuffle feel you mentioned. I wrote this in 12/8 for rhythmic accuracy. Since shuffle is not straight eighth notes when you do a double time feel it will not literally sound the same way as the original feel twice as fast since every other eighth note is actually the third number of a triplet. If you want the shuffle to be twice as fast then you must write it as “Double time feel, swing sixteenths” or literally make it double time with a metronome marking for clarity.