tv_listen_voice_indices_h -1
tv_listen_voice_indices -1

you can use spec_player 1/2/3/4/etc until you find the player slots you want to hear in the demo, then run that number into a binary to decimal converter, and then use tv_listen_voice_indices x (with x being the decimal result from the binary conversion

binary reads right to left rather than the standard western left to right, so you have to punch it in reverse into the squares at the bottom, pic below is the result for player slots 4, 5, 9, 11, and 12, which I found by just trial and erroring spec_player 1, spec_player 2, spec_player 3, and so forth until I found the slots I needed, punched it into the squares, and then hit convert to decimal, and put "tv_listen_voice_indices 3352" into console

https://i.imgur.com/KVprpgo.png

https://i.imgur.com/sbvb0Do.png

https://www.binaryconvert.com/convert_signed_int.html?hexadecimal=0

CS2 Config : https://www.dosya.tc/server3/p6icte/VentusCN_cfg___practice.rar.html

Config to get kz-ish movement:
mp_freezetime 0;
mp_team_intro_time 0;
mp_warmup_end;
mp_ignore_round_win_conditions 1;
mp_respawn_on_death_ct 1;
mp_respawn_on_death_t 1;
give weapon_usp_silencer;
sv_cheats 1;
bot_kick;
sv_airaccelerate 100;
sv_accelerate 6.5;
sv_friction 5;
sv_enablebunnyhopping 1;
sv_staminajumpcost 0;
sv_staminalandcost 0;
sv_timebetweenducks 0;
sv_ladder_scale_speed 1;
sv_falldamage_scale 0;
god;
mp_restartgame 1;

+exec autoexec.cfg -noreflex -high -nojoy -nogammaramp -allow_third_party_software