It is unquestioned that the right to counsel connotes effective aid in the preparation and trial of the case.
(In re Rose (1965) 62 Cal.2d 384, 386 [42 Cal.Rptr. 236, 398 P.2d 428];
People v.
Douglas (1964) 61 Cal.2d 430, 434 [38 Cal.Rptr. 884, 392 P.2d 964];
People v.
Ibarra (1963) 60 Cal.2d 460, 464 [34 Cal.Rptr. 863, 386 P.2d 487];
People v.
Karlin (1964) 231 Cal.App.2d 227, 231 [41 Cal.Rptr. 786].) Where at most there is faulty judgment on the part of an attorney selected by the defendant there is no deprivation of the effective aid of counsel in the constitutional sense.
(In re Rose, supra, 62 Cal.2d 384, 390-391; and see
People v. Robillard (1960) 55 Cal.2d 88, 96-98 [10 Cal.Rptr. 167, 358 P.2d 295, 83 A.L.R.2d 1086]; and
People v. Widener (1963) 220 Cal.App.2d 826, 829 [34 Cal.Rptr. 130].) On the other hand, where counsel’s lack of diligence or competence reduces the trial to a farce or sham the defendant has been deprived of the representation contemplated by the Constitution.
(People v.
Ibarra, supra, 60 Cal.2d 460, 464-466.) A corollary of the right to effective assistance is the right to have separate counsel upon request, or upon objection to having the same counsel, where it is reasonably probable the interests of each of two or more defendants will require the pursuit of a different course.
(People v.
Douglas, supra, 61 Cal.2d 430, 436-439; and see
People v.
Robinson (1954) 42 Cal.2d 741, 745-748 [269 P.2d 6];
People v.
Lanigan (1943) 22 Cal.2d 569, 574-577 [140 P.2d 24, 148 A.L.R. 176]; and
People v.
Kerfoot (1960) 184 Cal.App.2d 622, 637-645 [7 Cal.Rptr. 674].)
Nevertheless, the mere fact that one attorney represents multiple defendants does not deprive one of the defendants of his right to counsel, and the burden is on the defendant to advise the trial court of any alleged conflict of interest. (People v. Byrd (1964) 228 Cal.App.2d 646, 648-650 [39 Cal.Rptr. 644]; People v. Welch (1963) 212 Cal.App.2d 397, 400-402 [28 Cal.Rptr. 112]; People v. Rogers (1962) 207 Cal.App.2d 261, 269-271 [24 Cal.Rptr. 341]; People v. Sprinkle (1962) 201 Cal.App.2d 277, 281-282 [19 Cal.Rptr. 804]; People v. Hall (1960) 178 Cal.App.2d 878, 880-881 [3 Cal.Rptr. 442]; People v. Kitchens (1958) 164 Cal.App.2d 529, 542-543 [331 P.2d 127].) Where as here, the defendant has been represented by counsel of his own choice, the following is pertinent: “He was represented by private counsel of his own choice; he at no time raised any objection to him, to the manner in which he was being represented, or to the fact that